General Physics 1000+ MCQ with answer for ISRO Recruitment

1. The Indian Space Research Organisation (ISRO) is located at
A. Thumba
B. Bangalore
C. Ahmedabad
D. New Delhi
Answer : B

2. When a particle in motion is acted upon by a force in a direction perpendicular to the direction of motion, the path followed by the particle will be
A. a straight line
B. an ellipse
C. a circle
D. a parabola
Answer : D

3. 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

4. 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

5. The force of attraction or repulsion between two charged bodies is directly proportional to the product of the charges and inversely proportional to the square of distance between them. This was propounded by
A. Coulomb
B. Gilbert
C. Volta
D. Rutherford
Answer : A

6. The freezer in a refrigerator is placed near the top
A. to keep it away from the hot compressor which is near the bottom
B. because of convenience
C. so that it can cool the whole interior by setting up convection currents
D. to prevent too much cooling
Answer : C

7. A device used to measure heights above sea level is known as
A. altimeter
B. anemometer
C. dilatometer
D. potentiometer
Answer : A

8. Which of the following revolves round the nucleus in an atom?
A. protons
B. electrons
C. neutrons
D. positrons
Answer : B

9. If a body weight 12N on the surface of the earth, how much will it weigh on the surface of the moon where acceleration due to gravity is only one-sixth of that on earth's surface?
A. 12N
B. 2N
C. 10N
D. 6N
Answer : B

10. If the speed of the rotation of the earth increases the weight of a body
A. will increase
B. will decrease
C. will have no change
D. will either increase or decrease
Answer : B

11. Out of the following, name the fluorescent substance.
A. quinine sulphate solution
B. paraffin oil
C. fluorescein solutions
D. All the above
Answer : D

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

13. If a body is taken from the earth to the moon
A. both its mass and weight will be different
B. its mass will be different but the weight will remain the same
C. its mass and weight will both remain unchanged
D. its mass will remain the same but weight will be different
Answer : D

14. The Indian Satellite System used for domestic communications, television and meteorology is known as
A. INSAT
B. Bhaskara
C. Aryabhatta
D. All the above
Answer : A

15. Which of the following wires of same dimensions offers least resistance to the ,flow of current?
A. copper
B. aluminium
C. silver
D. nichrome
Answer : C

16. Halley's comet appears in the heavens once in
A. 40 years
B. 50 years
C. 76 years
D. 80 years
Answer : C

17. A balloon ruled with hydrogen will
A. continue going upwards uninterrupted
B. reach a particular height and remain floating
C. burst after reaching some height
D. reach a particular height and start coming down
Answer : B

18. The mode of travel of heat energy from the sun across the empty space beyond the earth's atmosphere is known as
A. conduction
B. convection
C. radiation
D. absorption
Answer : C

19. When a bullet is fired from a gun
A. the gun moves forward
B. the gun jumps up
C. the gun does not move
D. the gun recoils with the same momentum as the bullet
Answer : D

20. Every action has an equal and opposite reaction is Newton's law of Motion
A. first
B. second
C. third
D. fourth
Answer : C

21. When temperature decreases, resistance of metals to flow of electricity
A. increases
B. decreases
C. neither increases nor decreases
D. first increases then decreases
Answer : B

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

23. The completely dark portion of a shadow of an object is known as
A. umbra
B. penumbra
C. image
D. black portion of light
Answer : A

24. Astigmatism, a structural defect of the eye, is due to
A. the eye lens being thin
B. the eye lens being thick
C. lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
D. the pupil being very small
Answer : C

25. 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

26. Echoes are produced by
A. the reflection of sound waves
B. the refraction of sound waves
C. the interference of sound waves
D. reverberation of sound waves
Answer : A

27. The device used to record the sound is
A. a microphone
B. a headphone
C. a phonograph
D. an amplifier
Answer : C

28. 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

29. The loudness of a sound is determined by
A. Frequency
B. Amplitude
C. Speed
D. Wavelength
Answer : B

30. A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will
A. increase
B. decrease
C. remain the same
D. first decrease and then increase
Answer : B

31. An ammeter has
A. a high resistance
B. a very low resistance
C. no resistance at all
D. resistance of 400 ? w
Answer : B

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

33. The star nearest to the sun is
A. Proxima Centauri
B. Sirius
C. Aldebaran
D. Vega
Answer : A

34. In a microphone
A. sound energy is converted into electrical energy
B. electrical energy is converted into sound energy
C. sound energy is converted into mechanical energy
D. mechanical energy is converted into sound energy
Answer : A

35. For detecting and, testing of small electric charges we use
A. an electrophorus
B. an electroscope
C. an electromagnet
D. an ammeter
Answer : B

36. 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
A. increases
B. decreases
C. remains the same
D. first increases and then decreases
Answer : C

37. The maximum range of most TV signals is from 121 to 240 km only because
A. the curvature of earth limits the range of reception
B. the signals are weak
C. the signals are absorbed by air
D. the antennae are not powerful enough
Answer : A

38. The theory that the earth constituted the centre of the universe around which the sun and the planets revolved was propounded by
A. Copernicus
B. Ptolemy
C. Newton
D. Kepler
Answer : B

39. A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
A. greater than the weight of the man
B. less than the weight of the man
C. same as the weight of the man
D. zero
Answer : A

40. 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

41. The attraction between similar molecules is called
A. inertia
B. adhesion
C. cohesion
D. friction
Answer : C

42. While crossing a suspension bridge, the soldiers are ordered to break steps because
A. the marching in steps will involve a big strain on them
B. the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions
C. the marching may obstruct other traffic
D. rumblings of their marching may disturb the surroundings
Answer : B

43. The unit of power in SI is
A. Joule
B. Newton
C. Joule/Sec
D. Erg/Sec
Answer : C

44. Drinks kept in a vacuum flask remain hot or cold as the case may be for a long time because
A. both walls are silvered on the vacuum side
B. there is vacuum between the double walls
C. the cork is a poor conductor of heat
D. of all the above
Answer : D

45. Increase in pressure
A. has no effect on the boiling point of a liquid
B. raises the boiling point of a liquid
C. lowers the boiling point of a liquid
D. increases the volume of a liquid
Answer : B

46. Which of the following is wrongly matched?
A. electric current - ampere
B. resistance - Ohm
C. electric power - volt
D. electric charge Coulomb
Answer : C

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

48. The leader of the team who succeeded in constructing the first nuclear reactor (an atomic pile) in the world was
A. Albert Einstein
B. Enrico Fermi
C. HJ Bhabha
D. Sir Isaac Newton
Answer : B

49. 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

50. A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?
A. conduction and convection only
B. conduction and radiation only
C. convection and radiation only
D. conduction, convection and radiation
Answer : D