AP EAMCET · PHYSICS · Magnetic Properties of Matter
At a certain place a magnet makes 30 oscillations per minute. At another place where the magnetic field is double, its time period will be
- A \(4 \mathrm{~s}\)
- B \(2 \mathrm{~s}\)
- C \(\frac{1}{2} \mathrm{~s}\)
- D \(\sqrt{2} \mathrm{~s}\)
Answer & Solution
Correct Answer
(D) \(\sqrt{2} \mathrm{~s}\)
Step-by-step Solution
Detailed explanation
\begin{aligned} T=2 \pi & \sqrt{\frac{I}{M B_H}} \\ \therefore \quad \frac{T_1}{T_2} & =\sqrt{\frac{\left(B_H\right)_2}{\left(B_H\right)_1}} \\ T_2 & =T_1 \sqrt{\frac{\left(B_H\right)_1}{\left(B_H\right)_2}} \\ n_1 & =30 \text { oscillation } / \mathrm{min} \\ n_1 & =\frac{1}{2}…
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