TS EAMCET · Physics · Oscillations
At a given place, to increase the number of oscillations made by a simple pendulum in one minute from 72 to 90, the length of the pendulum is to be decreased by
- A \(64 \%\)
- B \(36 \%\)
- C \(50 \%\)
- D \(56 \%\)
Answer & Solution
Correct Answer
(B) \(36 \%\)
Step-by-step Solution
Detailed explanation
\(N \propto \frac{1}{\sqrt{L}} \Rightarrow \frac{N_2}{N_1} = \sqrt{\frac{L_1}{L_2}}\) \(\frac{90}{72} = \sqrt{\frac{L_1}{L_2}}\) \(\frac{5}{4} = \sqrt{\frac{L_1}{L_2}}\) \(\frac{25}{16} = \frac{L_1}{L_2}\)…
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