1000+ General Physics Multiple Choice Question Answer [Solved]

1. Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
A. the pores in the pot are closed
B. rain water stops oozing out from the pores
C. the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
D. surface of the pot becomes damp
Answer : C

2. When a body Is taken to the poles from the equator, Its weight becomes
A. greater
B. less
C. the same
D. None of these
Answer : A

3. Skating on ice is possible because
A. the surface of ice is smooth
B. ice is cold
C. the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
D. the pressure on the ice due to skate raises its melting point
Answer : C

4. The attraction of unlike molecules at the common surface is known as
A. adhesion
B. cohesion
C. surface tension
D. capillarity
Answer : A

5. The speed of sound in air at 0° C is approximately
A. 4 x 10 8 m/s
B. 1500 m/s
C. 330 m/s
D. 500 m/s
Answer : C

6. In a dynamo
A. mechanical energy is converted to light energy
B. mechanical energy is converted to heat energy
C. mechanical energy is converted to electrical energy
D. electrical energy is converted to mechanical energy
Answer : C

7. In the nucleus of an atom, the uncharged particle is
A. proton
B. neutron
C. electron
D. positron
Answer : B

8. Powder clings to the skin because of
A. cohesion
B. adhesion
C. capillary action
D. absorption
Answer : B

9. Lightning is produced when
A. similar charges of electricity rush towards each other and then get repelled
B. clouds strike against impurities in air and the friction burns up these impurities
C. strong opposite charges in different clouds break down the resistance offered by the intervening air
D. water vapour produces electricity in the clouds
Answer : C

10. A small bubble of air deep down in a lake rises up to the top of the lake. The volume of the bubble on coming up will
A. increase
B. decrease
C. will not change
D. first increase and then decrease
Answer : A

11. A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by
A. decreasing the radius of the capillary tube
B. increasing the radius of the capillary tube
C. increasing the height of water in the vessel
D. None of these
Answer : A

12. The line on earth's surface passing through the places having zero dip is called the magnetic equator. This passes through
A. Thumba
B. Delhi
C. Mumbai
D. Sriharikota
Answer : A

13. Electron-volt is a unit of
A. power
B. velocity
C. energy widely used in nuclear physics
D. number of electrons
Answer : C

14. The study of astronomy include a
A. astrology
B. astrophysics
C. astrometry
D. Both (b) and (c) above
Answer : D

15. The phenomenon of spontaneous disintegration of certain heavy nuclei is termed
A. radioactivity
B. fission
C. fusion
D. implosion
Answer : A

16. At what temperature do the Fahrenheit and Celsius scales give the same reading?
A. 212°
B. 32°
C. -40°
D. 0°
Answer : C

17. Nuclear fusion is a process in which
A. the atoms and molecules lose their identity
B. nucleus is split into fragments
C. the nuclear reaction between two light atomic nuclei results in the formation of a heavier nucleus with release of a large quantity of nuclear energy in the process
D. absorption of neutron by a nucleus
Answer : C

18. X-rays are
A. deflected by electric field
B. deflected by magnetic field
C. slightly deflected by electric field and magnetic field
D. not deflected by electric and magnetic fields
Answer : D

19. 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
A. the violet ray
B. the red ray
C. the green ray
D. the blue ray
Answer : B

20. 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.
A. rough white
B. rough black
C. shining white
D. shining black
Answer : B

21. When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light ray diminishes alter a few reflections. This is because of
A. poor reflection from the mirrors
B. scattering of light from the mirrors
C. absorption of some light by the mirrors
D. absorption of light by the atmosphere
Answer : C

22. It is difficult to bon potatoes at the top or a mountain because
A. the water available is hard
B. it is colder than at sea level
C. the potatoes become hard
D. the boiling point of water is lower at that height on account of low atmospheric pressure
Answer : D

23. Meteors
A. look like falling stars
B. are really pieces of rock or metal
C. burn up as they shoot through the air
D. All the above
Answer : D

24. The source of electric energy in an artificial satellite is
A. mininuclear reactor
B. a dynamo
C. a thermopile
D. solar cells
Answer : D

25. The sun continuously produces an enormous amount of energy. This la due to
A. nuclear fission
B. nuclear fusion
C. chemical combustion
D. boiling
Answer : B

26. A piece of cork is embedded inside an ice block which floats in water. What will happen to the level of water when all ice melts?
A. It will go down
B. It will come up
C. It will remain at the same level
D. First it will go down and it will come up
Answer : C

27. Besides protons, the nucleus of an atom contains
A. electrons
B. neutrons
C. neutrons and electrons
D. electrons, neutrons and other particles
Answer : B

28. The best estimates of the age of the earth comes from the studies of
A. angle of inclination of the earth
B. changes in radio-active minerals in it
C. period taken by Sun's light to reach the earth
D. artificial satellites revolving round the earth
Answer : B

29. A timer in a race is at the finish line. He should start his stop watch
A. as soon as he hears the report of the gun
B. the moment he sees the flash
C. either (a) or (b) since that makes no difference
D. None of the above
Answer : B

30. A hydraulic brake in an automobile uses
A. a fluid to transmit the braking force
B. the force applied by the driver
C. hydrogen gas and not any liquid
D. a vacuum brake
Answer : A

31. The image formed by a plane mirror is
A. of the same size as the object
B. at the same distance behind the mirror as the object is in front of it
C. virtual and laterally inverted
D. All the above
Answer : D

32. Frictional force acts in
A. the same direction as the motion
B. the opposite direction of the motion
C. all the directions
D. upward direction
Answer : B

33. Which part of the eye photographic camera?
A. Lens
B. Iris
C. Retina
D. Eyelid
Answer : D

34. 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
A. the violet ray
B. the red ray
C. the green ray
D. the blue ray
Answer : B

35. Pieces of camphor placed on water move about rapidly. This is because of
A. diffusion
B. viscosity
C. surface tension
D. capillarity
Answer : C

36. A man weighing 50 kg floats on water in a lake. His apparent weight is
A. 50 kg
B. 45 kg
C. zero
D. 150 kg
Answer : C

37. Ultrasonic waves are used
A. in medical and surgical diagnosis
B. in testing the quality of the linings and pads used in vehicles and aircraft brakes
C. to clean surgical instruments, jewellery and similar articles
D. All the above
Answer : D

38. Choose the correct answer
A. Microphone converts sound energy into electrical energy.
B. Electric fan converts electrical energy into mechanical energy.
C. Battery converts chemical energy into electrical energy.
D. All the above
Answer : D

39. Acoustics is a property or
A. Physics
B. Chemistry
C. Biology
D. Economic
Answer : A

40. The brightest planet in the Solar System is
A. Jupiter
B. Mercury
C. Venus
D. Sirius
Answer : C

41. Why is nuclear fusion also known as thermonuclear reaction?
A. Fusion converts nuclear energy into heat
B. Fusion demands conditions of extremely high temperature to produce it
C. Fusion produces large amount of heat
D. Fusion reactions takes place in the sun
Answer : B

42. Less dew is formed on cloudy nights because
A. there is no moisture in the atmosphere
B. clouds absorb the falling dew
C. objects emit radiant energy very fast on such nights
D. objects lose less radiant energy
Answer : D

43. A thermostat is a device used
A. for automatically maintaining a steady temperature
B. for measurin electricity
C. to reduce the voltage of electricity
D. for producing heat
Answer : A

44. The plants in a greenhouse are enclosed in a glass enclosure because
A. glass allows the heat radiations of shorter wavelengths from the sun to pass through
B. the plants absorb them - these shorter wavelengths - and reradiate them in the form of longer wavelengths
C. the longer wavelengths cannot penetrate through the glass walls
D. All the above
Answer : D

45. When the resistance of a circuit increases the current will
A. increase
B. decrease
C. remain the same
D. None of the above
Answer : B

46. Dioptre is the unit of power of
A. convex mirrors
B. concave mirrors
C. concave lenses
D. lenses irrespective of types
Answer : D

47. The electroplating of a metallic article
A. protects the article from atmospheric corrosion
B. gives it a more attractive appearance
C. Both (a) and (b) above
D. None of the above
Answer : C

48. The mixing up of two gases as a result of random motion of molecules is called
A. diffusion
B. effusion
C. vaporisation
D. sublimation
Answer : A

49. The red colour of the setting sun is due to
A. the least scattered red colour reaching the eye
B. the dispersion of sun light occurred in air molecule in atmosphere
C. the diffraction of sunrays in atmospheric layers
D. interference of all the rays coming from the sun
Answer : A

50. You want a supply of a small but constant current. Which of the following cells will you prefer?
A. Daniell cell
B. Leclanche cell
C. Dry cell
D. All the above
Answer : A