1000+ General Physics Multiple Choice Question Answer [Solved]

1. The air inside an electric, bulb is removed to prevent
A. oxidation of the tungsten filament
B. bursting of the bulb
C. loss of light due to absorption
D. keeping the weight of the bulb less
Answer : A

2. A photon is
A. a quantum of electromagnetic radiation
B. light source used in photography
C. a photo film
D. sun-light
Answer : A

3. The function of a ruse wire is
A. to stabilise the voltage
B. to decrease the current supply
C. to increase the current supply
D. to prevent an unduly high current from passing through a circuit
Answer : D

4. The planet that moves fastest around the sun is
A. Mars
B. Venus
C. Earth
D. Mercury
Answer : D

5. Which of the following has the highest refractive index?
A. Crown glass
B. Water
C. Flint glass
D. Diamond
Answer : D

6. A car parked in the sun with its windows closed gets terribly hot inside. This is due to
A. the heat emitted by the engine
B. the greenhouse effect
C. the good conducting power of the metal body
D. the double layered wind shield
Answer : B

7. When light passes from air to glass, its velocity in glass
A. increases
B. decreases
C. remains unchanged
D. first decreases then increases
Answer : B

8. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce heat loss by
A. convection
B. radiation
C. conduction
D. All the three
Answer : B

9. A man Jumping out of a moving train is thrown
A. forward
B. backward
C. sideways
D. None of the above
Answer : A

10. The velocity required to place a vehicle in orbit round the moon is _________ that required to place it in orbit round the earth.
A. less than
B. greater than
C. equal to
D. greater than or equal to
Answer : A

11. The shadow below a tree has bright spots in it because
A. light comes through circular gaps between the leaves
B. the leaves are circular
C. the rays bend to form circular spots
D. the gaps between the leaves act as pin holes
Answer : D

12. Heat transfer
A. cools the body that transfers it
B. heats the body that absorbs the heat
C. may change the physical state of the substance
D. All the above
Answer : D

13. The aneroid barometer uses
A. mercury
B. distilled water
C. alcohol
D. does not use any liquid
Answer : D

14. Galaxies emit
A. radio waves and X-rays
B. ultraviolet light waves
C. visible light waves
D. All the above
Answer : D

15. When a satellite la In a geostationary orbit the force keeping it in orbit Is
A. zero
B. the centrifugal force
C. reaction due to steady burning of fuel
D. the gravitational pull on the body by the earth is the weight of the body which provides the centripetal force
Answer : D

16. A device used in a ship for the purpose of measuring the depth of the sea is
A. an altimeter
B. a fathometer
C. a hydrometer
D. a sonometer
Answer : B

17. The overhead wires supported by high towers in the grid system carry
A. alternating current of very high frequency
B. alternating current of very high voltage
C. a very large direct current
D. a high voltage direct current
Answer : B

18. Body A is kept in contact with body B. Heat will flow from A to B if
A. the heat content of A is greater than that of B
B. the temperature of A is greater than that of B
C. the specific heat of A is greater than that of B
D. the specific heat of B is greater than that of A
Answer : B

19. Radio waves sent out by radio stations are reflected by
A. troposphere
B. stratosphere
C. mesosphere
D. ionosphere
Answer : D

20. The inside of both the walls of a thermos flask is silvered i.e., on the vacuum side in order to reduce heat loss by
A. convection
B. radiation
C. conduction
D. All the three
Answer : B

21. Holography is the technique of
A. taking photos of various objects
B. recording and reproducing three dimensional images
C. tracing out planets and stars in the sky
D. transmitting light waves
Answer : B

22. A rheostat is used
A. to increase the current flow in a circuit
B. to decrease the current flow
C. to measure the flow of electric current
D. Either (a) or (b) above
Answer : D

23. In a concert hall reverberation is controlled by
A. reduction of seating capacity in the hall
B. increase of sound intensity in the hall
C. lining the walls, with leather panels put on over a layer of sound absorbent glass fibre
D. by opening the doors and windows of concert hall
Answer : C

24. The planet with the reddish tinge is
A. Jupiter
B. Mars
C. Mercury
D. Saturn
Answer : B

25. The filament used in the electric lamp is made of
A. nichrome
B. tungsten
C. copper
D. aluminium
Answer : B

26. On applying a constant force to a mass, It moves with a uniform
A. velocity
B. momentum
C. acceleration
D. angular velocity
Answer : C

27. Solar radiation is preferred to other sources of energy because
A. it is practically inexhaustible
B. it is the cheapest form of energy
C. it does not cause pollution
D. All of the above
Answer : D

28. Before the invention of geostationary satellites, television stations could not transmit their programmes to far off places because
A. these signals are electromagnetic in nature
B. these are not electromagnetic in nature
C. their wavelength is very large
D. they are not reflected by the ionosphere but pass through it
Answer : D

29. Which of the following can produce electricity?
A. resistor
B. thermocouple
C. light bulb
D. neon tube
Answer : B

30. The heat produced in a conductor due to the passage of a current through it is proportional to
A. the square of the current
B. the resistance of the conductor
C. the time for which the current flows
D. All the above
Answer : D

31. The velocity required to place a vehicle in orbit round the moon is _________ that required to place it in orbit round the earth.
A. less than
B. greater than
C. equal to
D. greater than or equal to
Answer : A

32. An integrated circuit is more advantageous than a conventional circuit because
A. they make the electric equipment more reliable and easier for servicing
B. a faulty part of a conventional circuit may be difficult to locate and repair
C. if a part of the integrated circuit fails the entire circuit is simply replaced
D. All the above
Answer : D

33. Pyrometers are instruments used
A. for measuring the velocity of wind
B. in the manufacture of fireworks
C. in finding the coefficient of apparent expansion of a liquid
D. for measuring high temperatures
Answer : D

34. We always see only one side of the moon because
A. the sun comes in between the earth and moon
B. the moon is stationary
C. the time taken by the moon to rotate on its axis is the same as the time taken by it to revolve round the earth
D. moon revolves round the sun
Answer : C

35. The scientist who first sent electromagnetic waves to distant places was
A. James Clerk Maxwell
B. Heinrich Hertz
C. Thomas Alva Edison
D. Baird
Answer : C

36. The base of an electric iron is brightly polished mainly
A. to make it smooth and frictionless
B. to make it rust - proof
C. to reduce heat loss by radiation
D. to make it more durable
Answer : C

37. To produce beats it is necessary to have two waves
A. travelling in opposite direction
B. of slightly different frequencies
C. of equal wavelength
D. of equal amplitude
Answer : B

38. The brightest star visible to the naked eye is
A. Sirius
B. Vega
C. Rigel
D. Proxima Centauri
Answer : A

39. When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of
A. surface tension
B. capillarity
C. viscosity
D. diffusion
Answer : D

40. In the electrical circuit of a house the fuse acts as
A. a thermopile
B. a load
C. a step down device
D. a safety device
Answer : D

41. A lactometer la used to
A. find out the specific gravity of liquids
B. measure the volumes of liquids
C. test the purity of milk
D. determine the strength of acid in car batteries
Answer : C

42. Sound waves in air are
A. transverse
B. longitudinal
C. transverse and longitudinal
D. neither transverse nor longitudinal
Answer : B

43. The mirage is a phenomenon
A. generally considered as a desert happening
B. caused by unequal heating of the several layers of the atmosphere above the desert
C. in which the refracted rays take a curved path resulting in total internal refection
D. All the above
Answer : D

44. When a swing is drawn to a side Its potential energy In relation to the earth
A. increases
B. decreases
C. remains the same
D. is constant
Answer : A

45. In very cold countries alcohol is used as a thermometric liquid because
A. alcohol is a poor conductor of heat
B. alcohol can be coloured for its level to be seen easily
C. its freezing point is very low
D. it will not stick to the glass tube
Answer : C

46. For viewing objects placed at a higher level from a position at a lower level, the instrument used' Is known aa
A. telescope
B. spectrometer
C. microscope
D. periscope
Answer : D

47. Compared to the atomic bomb, the destructive power of a hydrogen bomb is
A. greater
B. less
C. equal
D. can't be determined
Answer : A

48. A person does not sink in the Dead Sea because
A. the sea contains a large amount of other salts besides sodium chloride
B. the density of the person is less than the density of the Dead Sea water
C. of the surface tension due to salt water in the Dead Sea
D. of difference in mass
Answer : B

49. How is it that Pluto is not always the farthest planet of the solar system?
A. Each planet becomes the farthest planet in its turn. Now it is the turn of Piuto
B. The Sun is now in the zodiac in which it is nearest to outer planets
C. The eccentricity of Piuto's orbit being substantial, this orbit cuts the orbit of Neptune
D. Piuto belongs to other solar system
Answer : C

50. The ringing of an electric bell in an enclosed evacuated glass bell jar is not heard outside because
A. the ringing is not loud enough
B. the glass of the bell jar absorbs the sound waves
C. the bell jar is too small
D. there is no air or -any other gas in the bell jar
Answer : D