Question

The amplitude of a damped oscillator becomes one half after $t$ second. If the amplitude becomes $(1/n)$ after $3 \,t$ second, then $n$ is equal to

• A. $\frac{1}{8}$
• B. 8
• C. $\frac{1}{4}$
• D. 4

Answer 1

Answer: (B)

8

Answer 2

A = $\frac{1}{2} \times \frac{1}{2} \times \frac{1}{2} = \frac{1}{8} = \frac{1}{n}$ . Hence n = 8