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In damped harmonic motion, the amplitude of oscillation
Aincreases with time (typical)
Bstays constant
Cdecays exponentially with time
Dvaries sinusoidally
Answer & Solution
Correct answer: C. decays exponentially with time
1. A damping force proportional to velocity removes energy from the oscillator.
2. The solution has the form x(t) = A₀ e^(−γt/2) cos(ω′t + φ).
3. Hence the amplitude factor A₀ e^(−γt/2) decays exponentially.
_Source: Maharashtra Balbharati Std XII Physics, Ch 5 "Oscillations" §5.9_
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