Principle of Superposition of Waves and Reflection of Waves NEET Questions

Physics - Oscillations and Waves

Principle of Superposition of Waves and Reflection of Waves MCQ Questions


13.
During interference, constructive interference occurs when the path difference is:
A.
(2n-1)位/4
B.
(2n+1)位/2
C.
n位/2
D.
n位, where n is an integer
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ANSWER :
D. n位, where n is an integer
14.
For a stationary wave, the distance between two consecutive nodes is:
A.
位/4
B.
位
C.
2位
D.
位/2
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ANSWER :
D. 位/2
15.
When a wave is reflected from a free end, its:
A.
Amplitude doubles
B.
Amplitude remains the same
C.
Frequency changes
D.
Speed increases
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ANSWER :
B. Amplitude remains the same
16.
The superposition of two waves of slightly different frequencies produces:
A.
Echo
B.
Beats
C.
Resonance
D.
Doppler effect
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ANSWER :
B. Beats
17.
The speed of a wave during reflection at a free boundary:
A.
Doubles
B.
Remains unchanged
C.
Reduces to half
D.
Becomes zero
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ANSWER :
B. Remains unchanged
18.
If the amplitude of two interfering waves is the same, then at the points of destructive interference, the resultant amplitude is:
A.
Maximum
B.
Zero
C.
Same as one wave
D.
Twice the amplitude of one wave
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ANSWER :
B. Zero