1 - 0°K is equivalent to
273°C
2 - 1 Joule is Equal to
10^7 ergs
3 - 1 Micron is equal to
106 m
4 - A barometer is kept inside a bell jar. Air is slowly pumped out of the jar.
The mercury level starts rising
5 - A boat will submerge when it displaces water equal to its own:
Weight
6 - A body falling through a liquid acquires a steady velocity is known as
Terminal velocity
7 - A bottle of sodalime is grasped by the neck and swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect?
Near the neck
8 - A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be
A parabola
9 - A circular plate, a cube and a sphere, all made up of same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?
Sphere
10 - A colour-blind person cannot
Distinguish between certain colours
11 - A concave lens always forms an image which is
Virtual and erect
12 - A copper disc has a hole. If the disc is heated, the size of the hole
Increases
13 - A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be
R/5
14 - A current carrying conductor is associated with
An electro-magnetic field
15 - A cyclist leans inwards when he is negotiating a curve so that
Necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
16 - A decibel is
A measure of sound level
17 - A disk and a sphere of same radius but different masses roll on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first ?
Sphere
18 - A doppler effect occurs when a source of sound moves
Both A & B
19 - A drop of liquid assumes spherical shape because:
A sphere has the least surface area for a given volume
20 - A dynamo is a device which
Converts mechanical energy into electrical energy
21 - A dynamo is used to convert
Mechanical energy into electrical energy
22 - A fixture is defined as a device which
Holds and locates a workpiece and guides and controls one or more cutting tools
23 - A fountain pen works on the principle of
Capillary action
24 - A freely suspended magnet remains horizontal at
The magnet equator
25 - A Fuse wire is characterised by
High resistance and low melting point
26 - A good conductor while carrying current is
Negatively charged
27 - A hydrogen balloon floats up because of
Weight of the balloon is less than the weight of air displaced by it.
28 - A light year is a measure of :
Distance
29 - A machine powered by rotating blades is a
Turbines
30 - A microscope used in pathological laboratories forms
Magnified, virtual and inverted image
31 - A needle or a pin floats on the surface of water because of
Surface tension
32 - A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to
Inertia of motion
33 - A permanent magnet can affect
Both A & B
34 - A person is hurt on kicking a stone due to
Reaction
35 - A photo-electric cell converts
Light energy to electrical energy
36 - A photon of X-ray has energy of 1 keV. A photon of visible radiation has energy of 3 eV. In this context, which one of the following statements is not correct?
The speeds of both the photons in vacuum are different
37 - A pilot has to release the bomb to hit a target
Before the target
38 - A single fixed pulley is used to draw water from a well because
Force is applied in a convenient direction
39 - A small drop of oil spreads over water because :
Water has a higher surface tension
40 - A soap bubble shows colours when illuminated with white light. This is due to
Interference
41 - A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will
Increase
42 - A sphere rolls down on two inclined planes of different angles but same height, it does so
With the same speed
43 - A spring is an example of which of these
Hooke's law
44 - A Step-Up transformer increases
Voltage
45 - A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
46 - A transformer
Is used to decrease or increase AC voltage
47 - A voltaic cell converts chemical energy to
Electrical energy
48 - A wheel-barrow is an example of
Class II lever
49 - A white and smooth surface is
Bad absorber and good reflector of heat
50 - Acceptable noise level for human ear
< 85 db
51 - According to Rutherford's atomic model, the electrons inside an atom are
Not Stationary
52 - After long periods of use, a grey spot develops on the inside of a bulb. This is because
Dust inside the bulb condenses on the top
53 - Air pressure is measured in which of the following units?
Pascal
54 - Alpha particle is the nucleus of an atom of
Helium
55 - An aircraft can perform aerobatic manoeuvres in a vertical loop because of
Gravity
56 - An atom with more neutrons than protons is called
Isotope
57 - An Electric generator is based on which of the following scientific principles?
Faraday's law of Electromagnetic Induction
58 - An object at rest may have
Potential energy
59 - An object which absorbs all colours and reflects none appears:
Black
60 - An oil drop spreads over water because
water has a higher surface tension
61 - Analog synthesis refers to a technology based on
Representing data in terms of measurable physical quantities.
62 - Anemometer is an instrument meant for measuring ________
Wind speed
63 - At hill stations, the boiling point of water will be
Less than that at sea level
64 - At low temperature, Lead behaves as a :
Superconductor
65 - At what temperature do the Fahrenheit and Celsius scales give the same reading?
-40 degreees
66 - Bandwidth is the
Both a & b
67 - Blotting paper absorbs ink due to
Capillary action phenomenon
68 - Boyle's law is a relationship between
Pressure and volume
69 - By how many times are the Electrostatic forces stronger than the Gravitational Forces for a fixed distance?
1036
70 - Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?
Ionosphere
71 - Choose the most appropriate answer: Natural radioactivity was discovered by
Henry Bacquerel
72 - Compressions and Rarefactions are characteristic of
Longitudinal waves
73 - Conversion of heat into electrical energy is achieved by using :
Thermocouple
74 - Conversion of sound energy into electrical energy is done by
Microphone
75 - Damp clothes are dried in spin dryers by the action of
Centrifugal forces
76 - Decibel is a term connected with :
Sound
77 - Decibel is the unit used for
Intensity of sound
78 - Depth of ocean is measured by
Fathometer
79 - Dioptre is the unit of
Power of a lens
80 - During thunderstorm you are travelling in a car. To protect yourself from the lightning you will have to
Remain in the car
81 - Dynamo is a device for converting
Mechanical energy into electrical energy
82 - Eclipses occur due to which optical phenomena?
Rectilinear propagation
83 - Electric current is measured by which instrument?
Ammeter
84 - Electric power is measured in units of
Watt
85 - Electricity is transmitted over long distances
There is less wastage of energy
86 - Electromagnet is constructed with which of the following ?
Soft Iron
87 - Electrons carry a
Negative Charge
88 - Energy stored in the nucleus of an atom is called
Nuclear energy
89 - Every hot object emits ________
Infrared rays
90 - Fat can be seperated from milk in a cream seperator because of :
Centrifugal Force
91 - Find the current (in A) when a charge of 500 Coulomb flows in 25 seconds.
20
92 - Find the resistance (in mega) of a wire of length 20m, cross sectional area 1 cm2 and made of a material of resistivity 200m.
40
93 - Flemings ''Left hand Rule" is associated with the effect of
Magnetic Field on current
94 - Fleming's right hand rule is used to find the direction of the
Induced current
95 - For which Diode is used ?
Purification
96 - For which one of the following does the centre of mass lie outside the body?
A ring
97 - Gear finishing operation is called
Burnishing
98 - Golden view of sea shell is due to
Polarization
99 - Heat transfer by radiation mainly depends upon
All of the above
100 - Hertz is a unit for measuring
Frequency of waves
101 - Hot springs are heated geothermally by underlying
Magma
102 - Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.
Rough black
103 - How many bottles of water is a gallon?
8
104 - Ice is packed in saw dust because
Saw dust is poor conductor of heat.
105 - Identify the vector quantity from the following
Angular momentum
106 - If a band is played on the moon the sound will
Not be heard at any distance at all from it
107 - If a barometric reading is falling, this usually indicates what
Decreasing pressure
108 - If a body moves with a constant speed in a circle
Its velocity remains constant
109 - If a boy sitting in a train, which is moving at a constant velocity, throws a ball straight up into the air, the ball will
Fall into his hand
110 - If an object moves with constant velocity,
It must have constant speed in constant direction
111 - If ice floating on water in a vessel melts, the water level in the vessel ________ .
Does not change
112 - If lift is going up with acceleration, the apparent weight of a body is
More than the true weight
113 - If the diameter of a capillary is doubled, then the rise of water in it will be
Half
114 - If the length of a simple pendulum is halved then its period of oscillation is
Decreased by a factor 2
115 - If the spinning speed of the earth is increased then the weight of body at the equator
Decreases
116 - If there were no gravity, which of the following will not be there for a fluid?
Upward Thrust
117 - If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same:
Momentum
118 - In a filament type light bulb most of the electric power consumed appears as
Infra-red rays
119 - In a freezer ice cubes will be formed more quickly in trays made of
Aluminium
120 - In a Laser (say neon laser) all the atoms emit the light waves of
All of the above
121 - In a nuclear reactor, one of the following is used as a fuel.
Uranium
122 - In a photocell light energy is converted into
Electrical energy
123 - In AC circuits, AC meters measure
Rms values
124 - In Astrophysics, what name is given to a hypothetical hole in outer space from which stars and energy emerge?
White hole
125 - In case of uniform circular motion, the acceleration is
Variable in magnitude but constant in direction
126 - In electronics what comes under tank circuit ?
Capacity and inductance
127 - In general, which is the cause of a sea breeze?
Specific heat
128 - In MRI machine, which one of the following is used?
Magnetic wave
129 - In nuclear reactor, heavy water is used as
Moderator
130 - In order to make an electromagnet you need a
All of the above
131 - In quantum mechanics a particle is represented by a
Wave packet
132 - In the absence of ozone layer, which rays will enter into atmosphere?
Ultraviolet
133 - In very cold countries alcohol is used as a thermometric liquid because
Its freezing point is very low
134 - In which of the following industries is mica as a raw material?
Electrical
135 - In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
Ultraviolet
136 - Infrasonic sound has a frequency lower than
20 Hz
137 - Instrument used to measure the force and velocity of the wind is
Anemometer
138 - It is easier for a man to swim in sea water, than in river water because
The density of sea water is more than the density of river water
139 - Kepler's law of planetary motion states that the square of the time period is proportional to the
Cube of the semi-major axis
140 - Knot is a measure of
The speed of ship
141 - Large astronomical telescopes always use as objective
combinations of lenses
142 - Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
visible light
143 - Light from Sun reaches Earth in approximately
8 minutes
144 - Light travels at the fastest speed in:
vacuum
145 - Liquids and gases never show
Ferromagnetic property
146 - Lux is the SI unit of
intensity of illumination
147 - Magnetic field lines about a current-carrying wire
Circle the wire in closed loops
148 - Magnifying Glass is basically a
Convex lens
149 - Materials for rain proof coats and tents owe their water proof properties to
Surface tension
150 - Materials for rain-proof coats and tents owe their water-proof properties to
surface tension
151 - Mercury is commonly used as a thermometric fluid rather than water because
mercury has greater visibility than water
152 - Microphone is a device which transforms the
Sound signal into current signal
153 - Modem is used mostly for ?
Connecting to internet
154 - Mud houses are cooler in summers and warmer in winters as compared to brick houses because
Mud is a bad conductor
155 - Name the process by which bubbles from liquid are formed?
Effervescence
156 - Negative acceleration is in the opposite direction of:
Velocity
157 - Negative feedback in amplifiers
Increases bandwidth and decreases noise
158 - No current will flow between two charged bodies if they have the same
Potential
159 - Number of lattices in the orthorhombic system is
7
160 - Oil raise up the wick in a lamp. The principle involves
capillary action phenomenon
161 - 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
162 - On a rainy day, small oil films on water show brilliant colours. This is due to
interference
163 - One billionth of a second is called
Nanosecond
164 - One should not connect a number of electrical appliances to the same power socket because
this can damage the domestic wiring due to overloading
165 - Optical fibre works on the
total internal reflection
166 - Optical fibre works on which of the following principle of light?
Total internal reflection
167 - Out of the following pairs, choose the pair in which the physical quantities do not have identical dimension?
Impulse and moment of force
168 - Out of the following pairs, which one does not have identical dimension?
Moment of inertia and moment of a force
169 - Out of the following, which is not emitted by radioactive substance?
Neutrons
170 - Outside of cooking utensils are generally left black from below because
Black surface is a good absorber of heat.
171 - Ozone layer above the surface of Earth provides a shield against
Ultra-violet rays
172 - 'Parsec' is the unit measurement of
Astronomical distance
173 - Pick out the scalar quantity
Pressure
174 - Planck's constant has the dimensions of :
Energy
175 - Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
Move towards B
176 - Q = mcdT refers to
Specific Heat formula
177 - Quality of a musical note depends on
Harmonics present
178 - RADAR is used for:
detecting and locating the position of objects such as Aeroplanes.
179 - Radio waves sent out by a radio stations are reflected by
Ionosphere
180 - Radiocarbon dating technique is used to estimate the age of
fossils
181 - Railway tracks are banked on curves
necessary centripetal force may be obtained from the horizontal component of the weight of the train
182 - Rain drops acquire spherical shape due to
Surface tension
183 - Rectifiers are used to convert:
Alternating current to Direct current
184 - Red is used as an emergency or danger signal as
Its wavelength is the longest
185 - Rocket works on the principle of
Newton's Third Law
186 - Rotameter is used to measure
Flow of fluids
187 - Safety fuse wire used in domestic electrical appliances is made of metal of low
Melting point
188 - Second and third class levers are differentiated by
The location of the load
189 - Sending a frame to a group of stations is known as
Multicasting
190 - Siphon will fail to work if
The level of the liquid in the two vessels are at the same height
191 - Slip rings are usually made of
Phosphor Bronze
192 - Soap bubble attains spherical shape due to ________
Surface tension
193 - Solids have definite shapes.This is because
The forces of cohesion are very large
194 - Sound following a flash of lightning is called
Thunder
195 - Sound travels at the fastest speed in
steel
196 - Sound waves do not show the phenomenon of
Polarisation
197 - Speed of sound is maximum in which among the following?
Solids
198 - Speed of sound is the greatest in :
Glass
199 - Sprayer functions on
Bernouli's principle
200 - Stars appear twinkling because of ......... of light.
Scattering
201 - Stars are held together by
Gravitational forces
202 - Stars in the sky appear to twinkle due to
A series of refractions
203 - Stationary wave is formed by
Two waves of same frequency travelling in the opposite direction
204 - Steam at 100°C causes more severe burns than water at 100°C because
Steam has latent heat of vaporisation
205 - Sun appears red in colour at sunrise and sunset due to
That all other colours scatter away except red
206 - Superconductors are substances which
offer no resistance to the flow of electricity
207 - Supercooling is cooling of liquid ________
Below freezing point
208 - Tap water is placed in an open pad and allowed to evaporate. After some time the temperature of water
Decreases slightly
209 - The absorption of ink by blotting paper involves
Capillary action phenomenon
210 - The amount of matter in a ball of steel is its :
Mass
211 - The atmosphere is heated mainly by
Radiation
212 - The Capacity of a communication channel is measured in
Band width
213 - The capacity of a water heater is measured in
Both A & B
214 - The coil wire in the electric room heater or electric cooking heater is called ________
Element
215 - The colour of sky appears blue due to
Scattering of shorter wave lengths
216 - The colours of stars depend on their
Temperature
217 - The complete form of 'IC' in electronics is
Integrated circuit
218 - The composition of electrician solder is
Lead-37%, tin-63%
219 - The device used to change the speed of an electric fan is
Regulator
220 - The device which transfer the signal from low resistance region to high resistance region is
Transistor
221 - The dimension MLT2 corresponds to
Force
222 - The direction of heat flow between two objects depends on
Their temperatures
223 - The distance between node and adjacent antinode is 30 cm. The wavelength is
60 cm.
224 - The domain theory of magnetism applies to
Cobalt
225 - The earth is a
Good absorber and good radiator of heat
226 - The electrical domestic tube light gives white fluorescent light because of
Falling of ultra violet rays on the white inner coating of the tube
227 - The energy emitted by the Sun is due to
Nuclear fusion
228 - The energy of a photon varies directly with its
Frequency
229 - The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by
Johannes Kepler
230 - The fact that two large ships travelling on close parallel courses in the same direction tend to move towards each other can be explained by
Bernoulli's principle
231 - The force that binds the neutrons and protons in a nucleus is called as:
Strong Nuclear Force
232 - The force that generates wind is
Pressure gradient force
233 - The frequency of direct current is ________
Zero
234 - The frequency used in TV and radar system lies in
UHF
235 - The function of ball bearings in a wheel is :
To increase friction
236 - The fuse in an electric circuit is connected in
Series with live
237 - The humidity of the air depends upon
All of the above
238 - The intensity ratio of waves is 25 : 9. What is the ratio of their amplitudes?
0.21041666667
239 - The Laser is a beam of radiations which are
Coherent and monochromatic
240 - The lift of an aeroplane is caused by
Bernouli's theorem
241 - The light of distant stars is affected by
Both A & B
242 - The material used in electric heater is
Nichrome
243 - The material used in the fabrication of a transistor is
Silicon
244 - The motion of a body around a circular path is an example of
Uniform velocity, variable acceleration
245 - The motion of a body that repeats itself after a regular interval of time is
A periodic motion
246 - The number of waves per second in a sound is called ________ of that sound.
Frequency
247 - The oldest type of energy known to man is
Geothermal energy
248 - The p wave of a normal Electrocardiogram indicates
Atrial depolarization
249 - The paramagnetic theory of magnetism applies to
Platinum
250 - The part of the eye having the largest refractive index is :
Lens
251 - The pitch of sound depends on its
Frequency
252 - The pressure exerted by a 760 mm column of mercury at 0°C is known as
1 pascal
253 - The purpose of choke in tube light is
Induce high voltage
254 - The quantity that is not conserved in an inelastic collision is
Kinetic Energy
255 - The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
There is no air or any other gas in the bell jar
256 - The rotational effect of a force on a body about an axis of rotation is described in terms of
Moment of force
257 - The safest hammers are those with heads that are
Alloy and drop-forged steel
258 - The shape of our milky way galaxy is
Spiral
259 - The size of gear is usually specified by
Pitch circle diameter
260 - The Solar energy produced by
Fusion reaction
261 - The source of the Sun's energy is the process of
Nuclear fusion
262 - The sparkling of a diamond is due to
Total internal reflection of light
263 - The speed of light in air is
3 × 108 m/s
264 - The speed of sound in air depends on
Temperature
265 - The speed of sound travel fastest through
Solid
266 - The spoon dropped by an astronaut in a satellite will
Continue to follow the motion of the satellite
267 - The substance which conducts current in the solid state is
Graphite
268 - The surface tension of water on adding detergent to it
Decreases
269 - The temperature at which water boils depends mainly on
Air Pressure
270 - The temperature of a liquid is 32° F. What is its temperature in Celsius scale?
0° C
271 - The term ''Isoneph' indicates the lines of equal
Cloudiness
272 - The three famous law of Kepler is related to
Planetary Motion
273 - The threshold frequency is the frequency below which :
Photo electric emission is not possible
274 - The unit for measuring electric power is the
Watts
275 - The unit of electrical power is
Watt
276 - The unit of noise pollution (level) is :
Decibel
277 - The velocity of falling rain drops attains a terminal value because of
Viscous force exerted by air
278 - The velocity of sound in air
Decreases with decrease of temperature
279 - The wall of a dam is made thicker at the bottom than at the top because the pressure exerted by the water on the wall
Increases with depth of the wall
280 - The washing machine works on the principle of
Centrifugation
281 - The wave like properties of electrons are useful in
Magnifying objects
282 - The weight of a body acts through the centre of
Gravity
283 - The word ''insolation' means
Incoming solar radiation
284 - The work done by the string of a simple pendulum during one complete oscillation is equal to
Zero
285 - The working of the quartz crystal in the watch is based on the
Piezo - electric Effect
286 - Through which light cannot pass?
Book
287 - To convert temperature from Celcius to Kelvin scale, you must ________ the given temperature.
Add 273
288 - Total number of colours exists in sunlight
7
289 - Tungsten is used for the manufacture of the filament of an electric bulb, because
It has a very high melting point
290 - Two metallic plate of equal thickness and coefficient thermal conductivity K1 and K2 put together face to face. A common plate is constructed. What is equivalent K?
2k1k2/k1+k2
291 - Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes
5R/4
292 - Two rods, one of copper and other of steel, experience the same upthrust when placed in water.Thus, both have
Equal volume
293 - Ultrasound devices operate with minimum frequency from
20kHz
294 - Vegetables are cooked in lesser time by adding a pinch of salt while cooking because
Boiling point of water increases
295 - Vehicles use ________ to see the objects coming from behind.
Convex lens
296 - Water drops cannot stick to the oily surface due to
Surface tension
297 - Water from soil enters into the root hairs owing to :
Capillary pressure
298 - Water is not suitable as a calorimetric substance because it :
Has high specific heat
299 - Water is used in car radiator because of its
High specific heat capacity
300 - Water pipes in hilly areas often burst on a cold frosty night, because
Water in the pipes freezes and on freezing water expands, so pipes break
301 - We always see the same face of the moon, because
It takes equal time for revolution around the earth and rotation on its own axis
302 - What apparatus is used to locate a submerged object?
Sonar
303 - What factors contribute to global winds?
All of the above
304 - What is the direction of torque?
Perpendicular to the direction of applied force
305 - What is the force of attraction between any two bodies by virtue of their masses is called?
Gravitational Force
306 - What is the full form of "RADAR" ?
Radio Detecting and Ranging
307 - What is the full form of ''AM' regarding radio broadcasting?
Amplitude Modulation
308 - What is the fundamental unit of amount of a substance?
Mole
309 - What is the name of the device used to convert alternating current into direct current ?
Rectifier
310 - What is the other name of Galileo's law of falling bodies?
Newton's first law
311 - What is the phenomenon which established the transverse nature of light ?
Polarisation
312 - What is the principle of a ''Life Jacket"?
It increases the volume of the person to keep him afloat
313 - What is the process of conversion of solid state directly to gaseous state called?
Sublimation
314 - What is the SI unit of Power?
Watt
315 - What is the size of Electron as comapared to Proton and Neutron?
1/1836
316 - What is the unit of Magnetic Induction?
Henry
317 - What is the unit of relative density?
It has no unit
318 - What is the unit of the physical quantity "Jerk"?
Meter per second cube
319 - What is the wavelength of visible spectrum ?
3900 A° 7600 A°
320 - What part of the atom has a positive charge?
Proton
321 - What should a person on a freely rotating turn table do to decrease his (angular) speed ?
Spread his hands outwards
322 - What type of force acts on a car moving around a curve?
Centripetal force
323 - What type of simple machine is an axe?
Both A & B
324 - When a bar magnet is cut into two equal halves, the pole strength of each piece
Remains the same
325 - When a barometer is rising air pressure is
Increasing
326 - When a barometer reading suddenly recedes, it indicates that climate
Will be extremely stormy
327 - When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is due to the phenomenon of :
Diffusion
328 - When a light wave is reflected from a mirror, there is a change in its
Amplitude
329 - When a number of resistors are connected in series in a circuit, the value of current:
Remains the same
330 - When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is
Above a certain minimum value irrespective of amount of water in the pail
331 - When a piece of stone is immersed in water, it displaces water of equal
Mass
332 - When a ring of metal is heated what happens to its hole ?
Expands
333 - When a running car stops suddenly, the passengers tends to lean forward because of:
Inertia of motion
334 - When a stone is thrown in the calm water of a pond the waves produced on the surface of water in the pond are
Transverse
335 - When a vibrating tuning fork is placed on a table, a loud sound is heard. This is due to :
Forced vibrations
336 - When an atom loses an electron it becomes
Positive ion
337 - When an electric bulb breaks, there is an explosive sound. That is due to
The air outside rushing in to fill the vacuum inside the bulb
338 - When an unbalanced force acts on an object
All of the above
339 - When hot liquid is poured into a thick glass tumbler, it cracks because glass :
Is a bad conductor of heat so only inner surface expands
340 - When number of turns in a coil is trippled, without any change in the length of coil, its self inductance becomes?
Nine times
341 - When pressure is increased the melting point of ice
Decreases
342 - When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will:
Double
343 - When the main switch of the house is put off it disconnects the
Live wire and the neutral wire
344 - When white light passes through a glass prism we get a spectrum on the other side of the prism. In the emergent beam the ray which is deviated least is
The red ray
345 - Where are mesons found ?
Cosmic rays
346 - Where does hydroelectric energy come from?
Water
347 - Where should a boat compass be mounted?
Away from electrical wiring
348 - Which Color has the Longest Wavelength?
Red
349 - Which colour has the highest energy?
Violet
350 - Which colour of light shows maximum deviation when passed through a prism ?
Violet
351 - Which conservation principle is applicable in the case of the motion of a rocket?
Conservation of momentum
352 - Which is best used as a sound absorbing material in partition walls ?
Glass - wool
353 - Which is the point from where an azimuth originates?
North
354 - Which law relates to the ideal gas law?
P1V1 = P2V2
355 - Which layer of the earth's atmosphere reflect back the radio waves to the earth's surface ?
Ionosphere
356 - Which liquid is the most viscous?
Oil
357 - Which measurement describes the pressure of a gas?
450 mm Hg
358 - Which metal is the best conductor of heat?
Copper
359 - Which of the following has the lowest frequency?
Visible light
360 - Which of the following instrument is used to measure Soil Water Tension?
Tensiometer
361 - Which of the following is a compound machine?
Bicycle
362 - Which of the following is a device designed to protect electrical devices from voltage spikes?
Surge protector
363 - Which of the following is a good conductor of heat but a bad conductor of electricity ?
Mica
364 - Which of the following is an example for cantilever beam?
Bridge
365 - Which of the following is an example of simple harmonic motion?
Simple pendulum motion
366 - Which of the following is arranged in order of decreasing conductivity?
Silver, Copper, Aluminium, Steel
367 - Which of the following is not a part of a CRT ?
Gas plasma
368 - Which of the following is not a transverse wave?
Sound waves
369 - Which of the following is not an aerosol?
Mud
370 - Which of the following is not true about X-rays?
Have low penetrating power
371 - Which of the following is the cleanest source of energy?
Wind energy
372 - Which of the following liquids has the least density ?
Petrol
373 - Which of the following metals is used for the manufacture of heating elements provided in electric iron ?
Nichrome
374 - Which of the following pairs of physical quantities have the same dimensions?
Work and Energy
375 - Which of the following phenomenon helps to conclude that light is a transverse wave?
Polarisation
376 - Which of the following properties is found only in ferromagnetic materials ?
Hysteresis
377 - Which of the following represents a relation for ''heat lost = heat gained'?
Principle of calorimetry
378 - Which of the following supports particle nature of photons ?
Photoelectric effect
379 - Which of the following waves cannot be polarised?
Ultrasonic
380 - Which of the metals has the maximum thermal conductivity?
Silver
381 - Which of these liquids has the highest viscosity?
Syrup
382 - Which of these travels in glass with minimum velocity ?
Violet light
383 - Which one is not a part of Kepler's Law?
Law of speed
384 - Which one is the unit of surface tension of a liquid
Electron volt /cm2
385 - Which one of the following determines the sharpness of image in a camera ?
The aperture
386 - Which one of the following has the highest value of specific heat?
Water
387 - Which one of the following instruments is used to study dispersion of light ?
Spectrometer
388 - Which one of the following is responsible for the working of Newton's colour disc experiment ?
Persistence of vision
389 - Which one of the following is the value of one nanometer?
10-7 cm
390 - Which tube used to produce X-ray?
Coolidge tube
391 - Who discovered X-ray?
Wilhelm Roentgen
392 - Who gave black hole theory?
Stephen Hawking
393 - Who indirectly determined the mass of the electron by measuring the charge of the electron?
Millikan
394 - Who was the first scientist to discover Electrons?
J.J Thompson
395 - Why do birds not have respiratory trouble at the time of flying at high altitude ?
They have extra air sacs
396 - Why does ice covered in sawdust not melt quickly ?
Sawdust is a bad conductor of heat
397 - Woollen cloth protects the body from cold because
It is a poor conductor of heat
398 - Working of safety fuses depends upon (01) magnetic effect of the current (02) chemical effect of the current (03) magnitude of the current (04) heating effect of the current. Select the correct answer using the code given below.
3 and 4 only
399 - Xrays are
Neutral particles
400 - X-rays region lies between
Gamma-rays and ultraviolet region
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