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Question

A particle is acted upon by force F = F cos(ωt) along X-axis. The amplitude of its velocity is given by v =  .  Choose the CORRECT condition for resonance :-

Options

A.Y2 = XZ
B.Z2 = XZ
C.Y2 = 4XZ
D.Y2 = YZ

Solution

At resonance v will be maximum, tending to infinity. So term in the denominator i.e. will tend to zero (minimum).
v =
∴   
⇒    ω =
∴    At, ω =
2 - Yω + Z = 0
⇒    X - Y + Z = 0 ⇒ Y2 = 4XZ

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