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Question

The equation for a wave propagating with a velocity of 330 m/s and having a frequency of 110 Hz and amplitude 0.05 m is

A
y=0.05sin2π[110t+x3]
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B
y=0.05sin2π[110tx3]
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C
y=0.05sin2π[110t±x3]
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D
y=0.05sin2π[110t330x]
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Solution

The correct option is C y=0.05sin2π[110t±x3]
V=330m/sf=110Hz Amplitude =0.05m
Equation of wave =Asin(ωt±km)k=ωv=2nfv=2π×110330=2π3ωt=2πft=2π×110t
Equation is 0.05sin(2π×110t±2π3x)=0.05sin2π(110t±x3)

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