1 - 1 amu is equivalent to
931 MeV
2 - 1 m/s equals ________ km/hr
18/5
3 - A 4 kg object is moving horizontally with a speed of 5 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is:
150 J
4 - A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of
30 m/s
5 - A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
Bend towards left
6 - A bird sitting on a high tension electric wire does not get electrocuted because
It does not form a closed path for the flow of current
7 - A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4 seconds.
36
8 - A body moving in a circular path with a constant speed has a
Constant kinetic energy
9 - A bomb at rest explodes into a large number of tiny fragments. The total momentum of all the fragments
Is zero
10 - A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
11 - A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
Will increase
12 - A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is
Zero
13 - A car parked in the sun with its windows closed gets terribly hot inside. This is due to
The greenhouse effect
14 - A concave lens always forms
A virtual image
15 - A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
Conduction, convection and radiation
16 - A cycle tyre bursts suddenly. This represents an :
Adiabatic process
17 - A device used for converting a.c. into d.c. is called
Rectifier
18 - A falling drop of rain water acquires the spherical shape due to
Surface Tension
19 - A gap is left between two rails of a railway track to accommodate...... of the metal.
Linear expansion
20 - A gas thermometer is more sensitive than a liquid thermometer because a gas :
Expands more than a liquid
21 - A gradual increase in loudness is known as
Crescendo
22 - A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle
At a higher elevation than the bird
23 - A man standing close to the platform at a railway station experiences a pulling force towards a fast moving train because of ________ .
Pressure difference due to fast moving air in between
24 - A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
Greater than the weight of the man
25 - A man stands on the pan of a balance holding a fish in his right hand and bucket of water in his left hand. If he transfers the fish into the bucket, the total weight on the pan
Remains the same
26 - A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole ?
Increase
27 - A metal semiconductor junction diode is called ________
Schottky diode
28 - A NOT gate can be implemented by:
A single transistor
29 - A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle ?
Parabolic
30 - A particle is thrown vertically upward. When it reaches the highest point, it has
A downward acceleration
31 - A person can jump higher on the moon's surface than on the earth because :
The acceleration due to gravity in moon is smaller than that on the earth.
32 - A person standing on a railway platform listens to the whistles of arriving and departing trains. The whistle heard is
Of higher pitch when train arrives
33 - A piece of wood is held under water. The upthrust on it will be:
Less than weight of the wood
34 - A rear-view mirror for driving is
Convex
35 - A spherical ball made of steel when dropped in mercury container
Will be on the surface of mercury
36 - A star appears twinkling in the sky because of
Refraction of light by atmosphere
37 - A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because
The stone conveys the heat away from the feet more rapidly than the carpet
38 - A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:
Just before it touches the ground
39 - A system exhibiting S.H.M. must possess
Elasticity as well as inertia
40 - A transformer works on the principle of
Mutual induction
41 - A vacuum cleaner works on the principle of pressure difference. On the moon it will
Not work at all
42 - A wavelength of 0.3 m is produced in air and it travels at a speed of 300 m/s. Then it will be an
Audible wave
43 - A wire carrying current is
Neutral
44 - A wire of copper having length I and area of cross-section A is taken and a current i is flown through it. The power dissipated in the wire is P. If we take an aluminium wire having same dimensions and pass the same current through it, the power dissipate
> P
45 - Absolute Zero is defined as
The temperature at which all molecular motion ceases
46 - Acceleration is the rate of change of
Velocity
47 - According to special theory of relativity the mass of a particle
Increases with increase in velocity with respect to an observer.
48 - According to the quantum theory of light, the energy of light is carried in discrete units are called
Photons
49 - According to the theory of relativity, which of the following always remains constant ?
Velocity of light
50 - Air coolers are more suitable for
Hot and dry climate
51 - Air is said to be saturated when
It contains the maximum content of water vapour
52 - Air pressure is usually highest when the air is
Cool and moist
53 - Among the following materials sound travels fastest in
Steel
54 - Amount of water vapour in the atmosphere is measured in terms of
Humidity
55 - An egg sinks in soft water but floats in a concentrated solution of salt because
The density of salt solution exceeds the density of eggs
56 - An electric fuse is based on
The heating effect of the current
57 - An electron and a proton starting from rest get accelerated through potential difference of 100 kV. The final speed of the electron and the proton are Ve and Vp respectively. Which of the following relations is correct?
Ve > Vp
58 - An electron microscope gives higher magnification than an optical microscope, because :
The wavelength of electrons is smaller as compared to the wavelength of visible light
59 - An ideal gas cannot be
Liquified
60 - An object having the capability to do work is said to possess
Energy
61 - An object with a mass of 22 kg moving with a velocity of 5 m/s possesses a kinetic energy of :
275 J
62 - As water is cooled from 4 deg C to 0 deg C, its density
Decreases
63 - At boiling point of liquids, its
Temperature remains constant
64 - At constant pressure, the volume of a fixed mass of a gas is directly proportional to its absolute temperature. It is the statement of
Charle's Law
65 - At what temperature (in degree Celsius), the numerical values on Celsius and Fahrenheit scales become equal?
–40
66 - At what temperature (in Fahrenheit) pure water freezes?
32
67 - Atmospheric pressure exerted on earth is due to
Gravitational pull
68 - Atomic hydrogen has a life period of
A fraction of a second
69 - Bats can sense obstacles because they produce
Ultrasonic sound waves
70 - Beta rays emitted by a radioactive material are
Charged particles emitted by nucleus
71 - Blowing Air with open pipe is an example of :
Isobaric process
72 - Bolometer is used to measure
Temperature
73 - Boyle's law relates to
Kinetic Theory of Gases
74 - Bubbles of air rise up through liquids due to
Viscosity and buoyancy
75 - Carbon Arc lamps are commonly used in
Cinema projectors
76 - Centrifugal force increases with
Acceleration
77 - Consider the following statements : (01) There is no net moment on a body which is in equilibrium. (02) The momentum of a body is always conserved. (03) The kinetic energy of an object is always conserved. Which of the statements given above is/are cor
1 and 2 only
78 - Contact force is another name for ________
Muscular force
79 - Copper wires are generally used for electrical power transmission instead of iron wire because :
Copper is a better conductor of electricity than iron
80 - Due to temperature variation along a conductor, potential variation occurs along it. This phenomenon is known as
Thomson effect
81 - During hot weather, the fan produces a feeling of comfort. This is because
Our perspiration eva-porates rapidly
82 - During uniform motion of an object along a straight line, its ________ remains constant with time.
Velocity
83 - Earliest thermometer was developed by
Galileo
84 - Echo is heard due to
Reflection
85 - Echolocation is an adaptation bats use to
All of the above
86 - Electric Motor converts ________ energy to mechanical energy
Electrical
87 - Electrical burns occur principally because of
The heat generated by the flow of electrical current through the body
88 - Electrical Energy is the energy of
Electrons
89 - Electrostatic precipitator is used to control the pollution of
Air
90 - Energy is continuously created in the sun due to:
Nuclear fusion
91 - Energy per unit volume is dimensionally equal to
Pressure
92 - Energy that is produced commercially from coal is called
Thermal energy
93 - 'Farad' is the unit of :
Capacitance
94 - Find the current (in A) when a charge of 1200C flows in 6 seconds.
200
95 - Fish and other aquatic creatures can live inside a deep frozen pond because
There will always be water just beneath the ice level
96 - Flight Recorder is technically called :
Black box
97 - For a ray of light to suffer total internal reflection it has to pass from :
Air to water
98 - For an ideal gas, which one of the following statements does not hold true?
The speed of all gas molecules is same
99 - For an object, the state of rest is considered to be the state of ________ speed.
Zero
100 - For photoelectric effect to take place, the metal used as the cathode should have ________
Low work function
101 - For which of the following game, players must have the knowledge of Pascal's law?
Scuba diving
102 - For which one of the following, ''Diodes" are generally used for?
Rectification
103 - Formula for distance is
Speed x time
104 - Fuse wire is made of an alloy of
Tin and Lead
105 - Gasoline is useful in cars because it has
Chemical potential energy
106 - Global warming is expected to result in
All of the above
107 - Heat energy is transferred by conduction whenever molecules
Collide each other
108 - Heat transfer horizontally within the atmosphere is called
Advection
109 - How much calorie of energy is released by a boiled egg ?
77
110 - Hydro-electric power is a:
Renewable natural resource
111 - Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be
At a higher level in water
112 - If a force acts upon two objects at rest, and having different masses for the same amount of time, then which one of the following will be the same for both the objects?
Momentum
113 - If an empty cylinder is half filled with a liquid, its center of gravity is
Shifted downwards
114 - If cream is removed from milk, its density
Increases
115 - If the distance between Sun and Earth becomes double, then the gravitational force on Earth will be
One Fourth
116 - If the earth suddenly stop rotating, the value of "g" will be
Increase
117 - If the velocity-time graph of a particle is represented by y = mt + c, then the particle is moving with
Constant acceleration
118 - If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?
LUV < lVIS < lIR
119 - If velocity is constant then acceleration is what?
Zero
120 - If we want to calculate the pressure of a liquid at the bottom of a vessel, the quantity which is not required to determine it, is
Surface area of the bottom of the vessel
121 - In a diesel engine the high temperature needed to ignite the fuel is achieved by
Compressing air in the cylinders
122 - In a magnetic field, the direction of motion of a current carrying conductor is given by
Flemings left hand rule
123 - In a optical fibre cable, the signal is propagated along the
Inner Core
124 - In a railway track, two rails are joined end to end with a gap in between them because
Accidents due to expansion in summer can be avoided
125 - In a rechargeable cell what kind of energy is stored within the cell?
Chemical energy
126 - In general, which is the cause of a land breeze?
Temperature
127 - In hydro power station, the motion produced in turbines is due to
Flow of water
128 - In radio-communication, the signals emitted by transmitting antenna are reflected on
Ionosphere
129 - In sunlight a rose appears red. In green light, the same rose appears
Black
130 - In the absence of the earth's atmosphere, sky would appear
Black
131 - In the Earth, the weight of a body is maximum at the
Surface
132 - In the electrical circuit of a house, the fuse acts as
A safety device
133 - In which form is the supplied heat energy stored during change in temperature of substance?
Kinetic energy
134 - In which of the following processes is energy released ?
Respiration
135 - Increased wind speed is accompanied by a reduced air ________
Pressure
136 - Indicate the correct arrangement for electromagnetic radiation in order of their increasing wavelength.
X - rays, infrared, visible, microwave
137 - Inside an aeroplane, flying at a high altitude,
normal atmospheric pressure is maintained by the use of air pumps.
138 - Instrument used to study the behaviour of a vibrating string is :
Sonometer
139 - Intensity of sound at a point is ____ its distance from the source.
inversely proportional to square of
140 - It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
Newton's third law
141 - It is easier to carry two buckets of water in one hand each, than to carry only one in one hand because
Centre of gravity and centre of equilibrium fall within the feet
142 - It is more difficult to walk on a sandy road than on a concrete road because
the friction between sand and feet is less than that between concrete and feet.
143 - It takes much longer to cook food in the hills than in the plains, because
in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
144 - Kilohertz is a unit which measures
Electromagnetic radio wave frequencies
145 - Kilowatt-hour is the unit of :
Energy
146 - Lakes freeze in cold countries in winter, leaving the water underneath at
4°C
147 - Lamberts law is related to
Illumination
148 - Land is considered a resource because it
Is used to produce things
149 - Large transformers, when used for some time, become very hot and are cooled by circulating oil. The heating of the transformer is due to:
Both the heating effect of current and hysteresis loss
150 - Lens is made up of which glass
Flint glass
151 - Light from the Sun reaches us in nearly
8 minutes
152 - Light year is a unit of
Distance
153 - Lightning is caused due to
Electric discharge
154 - Longitudinal waves cannot travel through
Vacuum
155 - Loudness of sound depends on
Amplitude
156 - Magnetic keepers are used to protect magnets from :
Self-demagnetization
157 - Magnetism at the centre of a bar magnet is
zero
158 - Man perceives sound vibrations in the frequency ranges of
20 – 20000 Hz
159 - Megahertz is a measurement of
Frequency
160 - Metals are good conductors of electricity because
They contain free electrons
161 - Middle latitude cyclones are fueled by?
Air high in the atmosphere
162 - Mirage is due to:
Unequal heating of different parts of the atmosphere
163 - Mist is caused by
Water vapour at low temperature
164 - Moment of inertia is:
Tensor
165 - Moving electric charge produces :
Magnetic field
166 - Name the process of production of energy in the Sun
Nuclear fusion
167 - Necessary element of change in solar energy to electrical energy
Silicon
168 - Noise is measured in
Decibel
169 - Nuclear sizes are expressed in a unit named
Fermi
170 - Nuclear sizes are expressed in a unit named
Fermi
171 - Of the following natural phenomena, tell which one known in Sanskrit as 'deer's thirst'?
Mirage
172 - Of the following properties of a wave, the one that is independent of the other is its
amplitude
173 - Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open
at a place in a valley below sea level
174 - Ohm's law is valid in case of
Conductor
175 - On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:
cohesion of mercury is greater than its adhesion with glass.
176 - On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because
metals are good conductor of heat
177 - On a cold day when the room temperature is 15°C, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15°C, because :
Metals are good conductors of heat
178 - On the Kelvin scale, the melting point of ice is
273K
179 - One thousand microns is equal to
10-3m
180 - Optical Fibre technology works on which of these principles of Physics?
Total internal reflection of Light
181 - Permissible noise level at Residential area during night time is :
45 dB (A)
182 - Photon is the fundamental unit/quantum of
Light
183 - Pitot tube is used to measure
Stagnation pressure
184 - Plants are dried up in winter due to frost because
There is mechanical loss of tissues and drought condition prevails
185 - Propagation of sound can be visualised as propagation of ________ variations in the medium
Density
186 - Proton carry a
Positive Charge
187 - Pure water is bad conductor of electricity because it is
Feebly ionized
188 - Pycnometer is an instrument used to measure the
Density
189 - Radian is used to measure
Angle
190 - Radio telescopes are better than optical telescopes because
All of the above
191 - Rain drops fall from great height. Which among the following statements is true regarding it?
They fall with that ultimate velocity, which are different for different droplets
192 - Rate at which velocity changes over time?
Acceleration
193 - Rate of doing work is called
Power
194 - Reading of a barometer going down is an indication of
Rainfall
195 - Refrigeration is a process which
Slows down the bacterial growth
196 - Relative humidity is expressed as
Percentage
197 - Remote-sensing device has an inbuilt source of
Infrared ray
198 - Resistance of human body in dry condition
100000 ohm
199 - Rise of oil a wick is due to
Surface tension of the oil
200 - Skating on ice is possible because
The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
201 - Small bubbles are perfectly spherical because of
Surface tension
202 - Solar cells work on the principle of
Photovoltaic effect
203 - Solids which conduct electricity at higher temperature but not at lower temperature are called
Semi-conductor
204 - Sound becomes hazardous noise pollution at decibels?
Above 120 db
205 - Sound is heard over longer distances on rainy days because
Sound travels faster in moist air
206 - Sound of frequency below 20 Hz is called
infrasonic
207 - Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Air, water and iron
208 - Sound waves in air are
longitudinal
209 - Sources of geothermal power are
Both A & B
210 - Specific gravity is defined as the ratio of
Density of the substance to the density of water
211 - Stars twinkle because
the refractive index of the different layers of the earth's atmosphere changes continuously.
212 - Steel is more elastic than rubber because it :
Is deformed very easily
213 - Submerged objects can be located using
Sonar
214 - Suitable impurities are added to a semiconductor depending on its use. This is done in order to
increase its electrical conductivity
215 - Sun's heat reaches us by
Radiation
216 - Super cooling stands for cooling of a liquid :
Below freezing point
217 - Superconductors are those elements
Whose resistance falls almost to zero at very low temperatures
218 - Temperature of distant luminous bodies can be determined by
Pyrometers
219 - Tensional forces normally cause which one of the following?
Normal faults
220 - The absolute zero is a temperature at which ________
Molecular motion in a gas would cease
221 - The angle in which a cricket ball should be hit to travel maximum horizontal distance is :
45° with horizontal
222 - The atmospheric layer reflecting radio waves is called
Ionosphere
223 - The audio signals of TV are
Frequency modulated
224 - The average kinetic energy of the molecules of an ideal gas is directly proportional to
Absolute temperature of the gas
225 - The base of an electric iron is brightly polished mainly
To reduce heat loss by radiation
226 - The best conductor of electricity among the following is :
Silver
227 - The best material for the core of a transformer is
Soft iron
228 - The boiling point of water decreases at higher altitudes is due to
Low atmospheric pressure
229 - The cause for the Tsunami, as deduced by the seismologists, is
Deformation of sea floor and vertical displacement of water
230 - The ''Choke' used with a tube light is basically
An inductor
231 - The density of a gas is maximum at
Low temperature, high pressure
232 - The density of water is 1 g/cc. This is strictly valid at
4°C
233 - The device used for measuring the wavelength of X-rays is
Bragg Spectrometer
234 - The different colours of different stars are due to the variation of
Temperature
235 - The dimension of Planck constant equals to that of
Angular momentum
236 - The dimensional formula for universal gravitational constant is
M–1L3T–2
237 - The earth-wire of a cable is connected to
The fuse of the appliance
238 - The electric current in a metal wire is due to the flow of -
Electrons
239 - The energy associated with motion is called
Kinetic energy
240 - The final image in a simple microscope is
Virtual, magnified and erect
241 - The flow of thermal energy is called
Heat
242 - The force between charged particles is called as:
Electromagnetic Force
243 - The force exerted by a magnet is an example of ________
Non-contact force
244 - The force that keeps a body in a circular motion called
The centripetal force
245 - The ''four stroke petrol engine' is based on
Otto-cycle
246 - The fuse in our domestic electric circuit melts when there is a high rise in
Current
247 - The GPS device in an automobile uses which communication channel?
Satellite
248 - The group of solar cells joined together in a definite pattern is called a
Solar cell panel
249 - The hydraulic brakes used in automobiles is a direct application of :
Pascal's law
250 - The illuminating powers of two sources are compared by
A photometer
251 - The impurity atoms with which silicon should be doped to make p-type semiconductors are
Boron
252 - The instrument which uses sound waves to measure the depth of oceans is
Sonar
253 - The large collection of stars, dust and gas held together by gravitational attraction between components is known as
Galaxy
254 - The law of conservation of energy states that
Energy can neither be created nor destroyed
255 - The Law of Kepler is related with which among the following ?
Planetary Motion
256 - The laws which govern the motion of planets are called ________
Kepler's Laws
257 - The light rays used for eliminating bacteria is
Ultra-violet radiation
258 - The magnifying power of an astronomical telescope can be decreased by
Increasing the focal length of the eyepiece
259 - The mass defect is the result of what action occurring?
Mass being converted to energy when protons and neutrons bind together in a nucleus
260 - The metal whose electrical conductivity is more, is
Silver
261 - The motion of a freely falling body is an example of ________ accelerated motion.
Uniformly
262 - The motion of the wheels of a bullock-cart while moving on the road is an example of
Translatory and rotatory motion
263 - The nature of fuse wire is
High resistance and low melting point.
264 - The odometer guage indicates
The distance travelled by a vehicle
265 - The optical phenomenon that is primarily responsible for the observation of rainbow on a rainy day is
Dispersion
266 - The period of revolution of a geostationary satellite is
24 hours
267 - The point where total mass of a body is supposed to be concentrated is known as
Centre of mass
268 - The purpose of choke in a fluorescent lamp is :
To decrease the current flow
269 - The rate at which energy is transferred is called
Power
270 - The rate of change of linear momentum of a body falling freely under gravity is equal to it's ________ ?
Weight
271 - The recoiling of gun is an example of which of the following?
Law of Conservation of Linear Momentum
272 - The reflector of a search light is a :
Concave mirror
273 - The rice is cooked more quickly in a pressure cooker because
Water boils at a higher temperature under pressure.
274 - The scientist who first sent electromagnetic waves to distant places is
Thomas Alva Edison
275 - The sensation of weightlessness in a spacecraft in an orbit is due to the
Acceleration in the orbit which is equal to the acceleration due to gravity outside
276 - The SI unit for measuring work and energy is
Joule
277 - The SI unit of luminous emittance is :
Lux
278 - The SI unit of resistance is:
Ohm
279 - The sound produced by a bat is–
Ultrasonic
280 - The spring balance works on the principle of ________ .
Hooke's Law
281 - The spring constant of a spring depends on its
Thickness, its diameter and its material
282 - The temperature which has the same reading on both Fahrenheit and Celsius scales is
–40°
283 - The term ''equinox' means
When the day and night are of equal duration
284 - The transport phenomenon occurs only in ________ state of a gas and is ________
Equilibrium, irreversible
285 - The unit of force is a
Derived Unit
286 - The unit of measurement of noise is
Decibel
287 - The velocity of sound is more in
Steel
288 - The velocity required to place a vehicle in orbit around the moon is ________ that required to place it in orbit round the earth.
Less than
289 - The wave of theory of light is based on
Huyghens' principle
290 - The waveform of a certain signal can be studied by
Sonometer
291 - The wavelength of a wave is the distance between
Both B & C
292 - The width of depletion layer of a P-N junction
Is increased under reverse bias
293 - The working of a rocket is based on the principle of:
Conservation of momentum
294 - 'Therm' is the unit of
Heat
295 - Thermal expansion of materials arises from
Asymmetry of potential energy curve
296 - Thermocouple consists of
Two dissimilar metals
297 - Time of exposure required for taking photograph of an object depends upon the
Brightness of the object
298 - To measure the speed of an approaching car a police officer shines
Radio waves on it
299 - To open a door easily, the handle should be fixed
None of these
300 - To resolve an object in an electron microscope,
The wavelength of the electrons must be close to the diameter of the object
301 - Total internal reflection can not take place when light goes from :
Water to glass
302 - Transformer is a device to convert
Low voltage A.C. into high voltage A.C.
303 - Transition ions absorb light in :
Visible region
304 - Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)
The silver piece will weigh more
305 - Universal gates are
NAND and NOR
306 - Velocitation is the tendency to
Be traveling at a speed that is faster than perceived
307 - Velocity of sound in air does not depend on
Pressure of air
308 - Ventilators are provided near the ceiling of the room because
These provide cross ventilation in the room
309 - Water boils at a lower temperature on the hills because
There is a decrease in air pressure on the hills
310 - Water has maximum density at
4°C
311 - Water will not be vapourised if
The humidity is 100%
312 - We feel cool when we sit near the fan, this is because
Air vapourises the sweat on our body.
313 - What is a neuron ?
Basic unit of nervous system
314 - What is another name for energy of motion?
Kinetic energy
315 - What is refractive index ?
It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
316 - What is the change in the angular momentum of a system as per the Law of Conservation of Angular momentum, if the total external torque acting is zero?
Remains constant
317 - What is the minimum escape velocity of rocket to be launched into space ?
11 Km/Sec.
318 - What is the range of Strong Nuclear force?
Very short Nuclear size
319 - What is the reason for formation of Mirage in desert?
Both Refraction and Total internal reflection of light
320 - What is the SI unit of Force?
Newton
321 - What is the SI unit of temperature?
Kelvin
322 - What is the source of energy for the water cycle?
Sun
323 - What is the unit of the physical quantity "Inductance"?
Henry
324 - What is the unit of the physical quantity Entropy?
Joule per kelvin
325 - What is the value of 1 kW = ?
1000 W
326 - What measures Air pressure?
Barometer
327 - What type of lens is used in a magnifying glass
Convex
328 - When a body is immersed in a liquid, the force acting on it is
Both (A) and (B)
329 - When a person sitting on a swing stands up on the swing, the frequency of oscillation
Increases
330 - When a ship enters the sea from a river what will be the effect?
It rises a little
331 - When a strong beam of light is passed through a colloidal solution, the light will
Be scattered
332 - When all the forces and torques are balanced in a mechanical body it is said to be in
Equilibrium
333 - When hot-water is sprinkled on a hotter glass tumbler, it breaks because
Glass suddenly contracts
334 - When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is
Scattering of light
335 - When water freezes its density
Decreases
336 - Where is a transistor most likely to be found ?
Hearing aid
337 - Which alternative energy source is exhaustible?
Geothermal energy
338 - Which among the following is false about displacement?
It is always positive
339 - Which among the following is the fundamental quantity ?
Time
340 - Which colour is the complementary colour of yellow ?
Blue
341 - Which combination of colour is the most convenient during day and night time ?
Red and green
342 - Which compressor is usually used in AC?
Reciprocating
343 - Which electromagnetic radiation is used for satellite communication ?
Radiowave
344 - Which elements are malleable and good conductors of electricity?
Tin and silver
345 - Which has the lowest albedo?
Dark surfaces
346 - Which is a common first indicator of an approaching thunderstorm?
A buildup of dark clouds
347 - Which measurement depends on gravitational force?
Weight
348 - Which microscope is often used to view metal surfaces?
Scanning tunneling microscopes
349 - Which of the following are methods of heat transfer?
Convection
350 - Which of the following cannot be used for making lenses?
Soil
351 - Which of the following characteristics of light remains unchanged when light travels from vaccum enters water?
Frequency
352 - Which of the following has the shortest wavelength?
Gamma rays
353 - Which of the following have the same unit ?
Work and torque
354 - Which of the following is a conductor of electricity ?
Salt water
355 - Which of the following is a Non Renewable Resource of Energy?
Natural Gas
356 - Which of the following is a non renewable source of energy ?
Coal
357 - Which of the following is a renewable resource of energy?
All of the above
358 - Which of the following is an example of continous emission spectrum?
Spectrum of an oil frame
359 - Which of the following is an insulator?
Glass
360 - Which of the following is correct about the properties of Gravitational Forces?
They observe inverse square law
361 - Which of the following is not a property of heavy water ?
Boiling point of heavy water is lower than that or ordinary water
362 - Which of the following is not a valid conservation law of classical physics?
Law of conservation of current
363 - Which of the following is not reversible?
Joule effect
364 - Which of the following is preferred for accelerating electrons?
Betatron
365 - Which of the following is used for regulated electric supply ?
Zener diode
366 - Which of the following liquids is most viscous?
Oil
367 - Which of the following occurred first ?
Guglielmo Marconi sent out the first wireless signals
368 - Which of the following pair is Incorrect? I. Parsec - Distance II. Barrel - Liquid III. Light year - Time
Only III
369 - Which of the following property of sound is affected by change in air temperature?
Wavelength
370 - Which of the following uses a Non Renewable Energy Source?
Nuclear Power Plant
371 - Which of the following was the first theory of superconductivity?
London theory
372 - Which of these is exhibiting kinetic energy?
A space station orbiting Earth
373 - Which of these waves can be polarized ?
Light waves
374 - Which one among the following components can not be developed within an ''integrated circuit"?
Transformer
375 - Which one of the following animals can hear ultrasonic sound ?
Bat
376 - Which one of the following is a non-dimensional quantity?
Strain
377 - Which one of the following is applicable to collision-coalescence process of precipitation?
Clouds which do not extend beyond the freezing level
378 - Which one of the following is not a property of electromagnetic waves?
Electromagnetic waves do not show interference and diffraction.
379 - Which one of the following physical quantities has the same dimensions as that of Planck's constant?
Angular momentum
380 - Which one of the following wavelengths of light is most effective in photosynthesis ?
Blue
381 - Which one of the waves have the longest wavelength
Red
382 - Which phenomena shows the particle nature of light?
Photoelectric effect
383 - Which phenomenon is responsible for the echo of sound wave?
Reflection
384 - Which planet has the lowest density?
Saturn
385 - Which process allows water to enter the atmosphere?
Evaporation
386 - Which resource is both renewable and inexpensive?
Sunlight
387 - Which statement best describes an igneous intrusion?
Magma is injected into surrounding rock forming an igneous intrusive
388 - Which term is not associated with sound wave?
Candela
389 - Which type of reaction produces the most harmful radiation ?
Fission reaction
390 - Which waves cannot be transmitted through vacuum?
Sound
391 - Who among the following gave the Uncertainty principle?
Werner Heisenberg
392 - Who defined the law of gravitation ?
Newton
393 - Who gave the Theory of Relativity?
Albert Einstein
394 - Who is known as the 'father of quantum theory'?
Max Planck
395 - Who is the first person to define speed
Galileo
396 - Why does'nt the hydrogen atom emit X-rays?
Its energy levels are very close to each other
397 - Why the needle of iron swims on water surface when it is kept gently ?
Due to surface tension
398 - Why two thin shirts can keep us warmer than a single thick shirt in winter ?
Air layer between two shirts behaves like insulating media
399 - Wind and solar energy are examples of
Renewable
400 - Wollen clothes keep the body warm because
Wool is a bad conductor
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