AIIMS2003Physics-Oscillations
AIIMS 2003 Physics Damped Oscillations Assertion Reason Question
Type: Assertion Reason-conceptual-Medium-Class 11
Assertion : The amplitude of an oscillating pendulum decreases gradually with time.
Reason : The frequency of the pendulum decreases with time.
A
Both Assertion and Reason are true and Reason is the correct explanation of Assertion.
B
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C
Assertion is true but Reason is false.
D
Both Assertion and Reason are false.
Correct Answer
Option C
Detailed Explanation
The amplitude of an oscillating pendulum decreases with time because of friction due to air. Frequency of simple pendulum is given by f = 1/2π √(g/l) which is independent of amplitude and so even though the frequency remains the same, the amplitude keeps on decreasing till it becomes zero.
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