NEET Physics Damped & Forced Oscillations Assertion Reason Question
Assertion (A): In a damped oscillator, the amplitude of oscillation decreases exponentially with time. | Reason (R): The damping force in a damped oscillator is proportional to the velocity of the oscillator.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context states that the displacement x(t) = A e^(-bt/2m) cos(ω′t + φ) indicates exponential decay of amplitude in a damped oscillator, and the damping force is given by F_d = -bv, confirming the proportionality to velocity.
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