Question:

In a uniform magnetic field of \(0.049 T\), a magnetic needle performs \(20\) complete oscillations in \(5\) seconds as shown. The moment of inertia of the needle is \(9.8 \times 10 kg m^2\). If the magnitude of magnetic moment of the needle is \(x \times 10^{-5} Am^2\); then the value of '\(x\)' is
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Updated On: Jul 18, 2024
  • \(5\pi^2\)
  • \(128\pi^2\)
  • \(50\pi^2\)
  • \(1280\pi^2\)
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The Correct Option is D

Solution and Explanation

The correct option is (D) :\(1280\pi^2\)
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