Academictask provides MCQs of Physics from Basic to Advance, so that you can prepare accordingly. Physics Mcqs section is useful for both students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test, BPSC Test, other competitive and entry test preparations. Here you will find physics MCQs and answers with detailed explanations. MCQs of Physics include basic physics MCQs, Measurements MCQs, Vectors And Equilibrium MCQs, Work and Energy MCQs, Motion and Force MCQs, Circular Motion MCQs, Fluid Dynamics MCQs, Waves MCQs, Heat and Thermodynamics MCQs, Current Electricity MCQs, Electrostatics MCQs, Electromagnetism MCQs, Electromagnetic Induction MCQs, Alternating Current MCQs, Nuclear Physics MCQs, etc.

61. The velocity of sound in air would become double than its velocity at 0°C at temperature ?

A. 313°C
B. 586°C
C. 819°C
D. 1172°C

62. Ultrasonic have__________________?

A. frequency in the audible range
B. frequency is greater than 20 kHz
C. frequency lower than 20 Hz
D. all of above

63. The number of beats produced per second is equal to____________________?

A. the sum of the frequencies of two tuning forks
B. the difference of the frequencies of two tuning forks
C. the ratio of the frequencies of two tuning forks
D. the frequency of either of the two tuning forks

64. Silence zone takes place due to____________________?

A. constructive interference
B. destructive interference
C. beats
D. resonance

65. The distance between any two consecutive crests or troughs is called____________________?

A. frequency
B. period
C. Wave length
D. phase difference

66. In vibrating cord the points where the amplitude is maximum, are called ___________________?

A. antinodes
B. nodes
C. troughs
D. crests

67. A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?

A. always an node in formed
B. always an antinode is formed
C. neither node nor antinode is formed
D. sometimes a node and sometimes an antinode is formed

68. According to Newton sound travel in air under the conditions of_____________________?

A. adiabatic
B. isothermal
C. isobaric
D. isochoric

69. Velocity of sound in vacuum is ____________________?

A. 332 ms-1
B. 320 ms-1
C. Zero
D. 224 ms-1

70. The velocity of sound is greatest in___________________?

A. Water
B. air
C. copper
D. ammonia

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