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A simple pendulum of length 0.4m has a period of 2s. What is the period a similar ...

A simple pendulum of length 0.4m has a period of 2s. What is the period a similar pendulum of length 0.8m at the same place?
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  • A 8s
  • B 4s
  • C 2\(\sqrt{2}s\)
  • D \(\sqrt{2}s\)
Correct Answer: Option C
Explanation:
T2 = \(\sqrt{\frac{L^2 \times T_1^2}{L_1}}\)
= \(\sqrt{\frac{0.8 \times 2^2}{0.4}}\)
= 2\(\sqrt{2}s\)

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