physics MCQs – Page 3

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
41. The branch of science which deals with the properties of matter and energy is called__________?
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A. Geography

B. Biology

C. Physics

D. Chemistry

42. 1st law of motion gives the definition of _________________________?
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A. rest

B. motion

C. velocity

D. force
43. Light reaches the earth form sun in nearly____________________?
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A. 8 minutes

B. 10 minutes

C. 8 minutes 30 seconds

D. 15 minutes

44. The Branch of Physics deals with highly energetic ions is called__________?
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A. Plasma physics

B. Ionic physics

C. Article physics

D. Elementary articles

45. appearance of colour in thin films is due to ____________________?
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A. polarization

B. interference

C. diffraction

D. dispersion

46. When car takes turn around a curve road, the passengers feel a force acting on them in a direction away from the center of the curve. It is due to__________________?
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A. Centrifugal force

B. Gravitational force

C. Centripetal force

D. Their inertia

47. The branch of physics which deals with the living things is called_________?
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A. cell systems

B. biological sciences

C. elementary physics

D. physical sciences

48. When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?
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A. remains unchanged

B. increases

C. decreases

D. becomes zero

49. Which one of the following is nearly monochromatic light ?
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A. light form fluorescent tube

B. light form simple lamp

C. light form neon lamp

D. light form sodium lamp
50. The blue colour of the sky is due to___________________?
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A. scattering

B. diffraction

C. reflection

D. polarization

51. Which of the following pair has same direction always ?
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A. force, momentum

B. force, acceleration

C. force, displacement

D. force, velocity

52. The graphical representation of Ohms law is___________________?
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A. ellipse

B. hyperbola

C. parabola

D. straight line
53. The locus of all points in a medium having the same phase of vibration is called____________________?
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A. wavelength

B. wave front

C. crest

D. trough

54. Ultrasonic have__________________?
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A. all of above

B. frequency in the audible range

C. frequency lower than 20 Hz

D. frequency is greater than 20 kHz
55. How much heat does a 40 W bulb generates in one hour ?
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A. 1.44J

B. 14J

C. 144J

D. 144000J
56. If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be_______________?
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A. 3600C

B. 2C

C. 7200C

D. 1C

57. Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
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A. 2010-10m

B. 4 x 10-10 m

C. 0.0210-10m

D. 2 x 10-10 m
58. A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?
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A. 1/2f

B. 2f

C. frequency lower than 20 Hz

D. 1/4f

59. Waves transmit ________________ from one place to another?
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A. energy

B. mass

C. both

D. none

60. Area under velocity time graph represent_____________________?
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A. force

B. displacement

C. acceleration

D. distance