Waves and Sound AFCAT Questions

AFCAT Physics

Waves and Sound MCQ Questions


7.
In Simple Harmonic Motion (SHM), the restoring force is:
A.
Inversely proportional to displacement
B.
Directly proportional to displacement and directed away from mean position
C.
Directly proportional to displacement and directed towards mean position
D.
Independent of displacement
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ANSWER :
C. Directly proportional to displacement and directed towards mean position
8.
The displacement of a particle in SHM is given by x(t) = A cos(ωt + φ). The quantity (ωt + φ) is called:
A.
Amplitude
B.
Phase constant
C.
Phase
D.
Angular frequency
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ANSWER :
C. Phase
9.
The angular frequency ω of SHM is related to its time period T by:
A.
ω = 2π/T
B.
ω = π/T
C.
ω = T/2π
D.
ω = πT
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ANSWER :
A. ω = 2π/T
10.
In SHM, the acceleration of a particle is:
A.
Constant throughout the motion
B.
Maximum at mean position
C.
Proportional to displacement and directed towards mean position
D.
Proportional to displacement and directed away from mean position
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ANSWER :
C. Proportional to displacement and directed towards mean position
11.
The maximum velocity of a particle executing SHM with amplitude A and angular frequency ω is:
A.
A/ω
B.
ω²A
C.
A²ω
D.
ωA
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ANSWER :
D. ωA
12.
The maximum acceleration of a particle executing SHM with amplitude A and angular frequency ω is:
A.
ω/A
B.
A/ω
C.
ωA
D.
ω²A
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ANSWER :
D. ω²A