Waves and Sound AFCAT Questions

AFCAT Physics

Waves and Sound MCQ Questions


1.
Which of the following is the smallest interval of time after which a periodic motion repeats itself?
A.
Amplitude
B.
Frequency
C.
Phase
D.
Period
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ANSWER :
D. Period
2.
The SI unit of frequency is:
A.
Metre per second
B.
Radian per second
C.
Hertz (Hz)
D.
Second (s)
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ANSWER :
C. Hertz (Hz)
3.
If the time period of a pendulum is 0.5 seconds, what is its frequency?
A.
0.5 Hz
B.
0.2 Hz
C.
5 Hz
D.
2 Hz
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ANSWER :
D. 2 Hz
4.
A human heart beats 75 times per minute. Its frequency is:
A.
75 Hz
B.
0.8 Hz
C.
1.25 Hz
D.
1.5 Hz
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ANSWER :
C. 1.25 Hz
5.
Which of the following statements is TRUE?
A.
Every periodic motion is oscillatory
B.
Oscillatory and periodic motions are identical
C.
Circular motion is oscillatory
D.
Every oscillatory motion is periodic, but every periodic motion need not be oscillatory
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ANSWER :
D. Every oscillatory motion is periodic, but every periodic motion need not be oscillatory
6.
Vibration differs from oscillation primarily in:
A.
Amplitude
B.
Phase
C.
Direction
D.
Frequency
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ANSWER :
D. Frequency