Question

The displacement of a damped harmonic oscillator is given by
x(t) = e⁻⁰·¹ ᵗ cos(10πt + Φ). Here t is in seconds.
The time taken for its amplitude of vibration to drop to half of its initial value is close to:
(A) 13 s (B) 27 S
(C) 4 s (D) 7 s

Answer 1

Answer:

b

Explanation:

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Answer 2

Correct option d. 7 s

Explanation:

A0/2 = A0e -0.it

t = 10 In (2)

= 7 sec

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