Standing Waves in Strings and Organ Pipes, Fundamental Mode and Harmonics, Beats NEET Questions

Physics - Oscillations and Waves

Standing Waves in Strings and Organ Pipes, Fundamental Mode and Harmonics, Beats MCQ Questions


7.
For a closed organ pipe of length L, the fundamental frequency is proportional to:
A.
1/2L
B.
1/4L
C.
1/L
D.
4L
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ANSWER :
B. 1/4L
8.
In a stationary wave, the points where displacement is always zero are called:

NEET - 2015

A.
Antinodes
B.
Nodes
C.
Crests
D.
Troughs
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ANSWER :
B. Nodes
9.
Beats are produced when two sound waves:
A.
Have the same frequency
B.
Have slightly different frequencies
C.
Travel in different media
D.
Have a phase difference of 180 degrees
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ANSWER :
B. Have slightly different frequencies
10.
In a standing wave pattern, the points where displacement is always zero are called:
A.
Crests
B.
Antinodes
C.
Nodes
D.
Troughs
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ANSWER :
C. Nodes
11.
If the frequency of one tuning fork is 256 Hz and another produces 6 beats per second with it, the possible frequency of the second fork is:
A.
250 Hz only
B.
256 Hz
C.
262 Hz or 250 Hz
D.
262 Hz only
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ANSWER :
C. 262 Hz or 250 Hz
12.
The fundamental frequency of a vibrating string is 200 Hz. The frequency of its second harmonic will be:
A.
600 Hz
B.
200 Hz
C.
400 Hz
D.
100 Hz
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ANSWER :
C. 400 Hz