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Q.

A particle is subjected to two simple harmonic motions in the same direction having equal amplitudes and equal frequency. If the resultant amplitude is equal to the amplitude of the individual motions, the phase difference between the individual motions is            

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a

π

b

4π3

c

π3

d

2π3

answer is C.

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Detailed Solution

A2=A2+A2+2A2cosϕ

cosθ=−12⇒θ=120°=2π3

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