A magnetic needle of magnetic moment and moment of inertia is performing simple…

PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter

Problem

A magnetic needle of magnetic moment 6.7×10−2 Am26.7 \times 10^{-2} \text{ Am}^2 and moment of inertia 7.5×10−6 kg m27.5 \times 10^{-6} \text{ kg m}^2 is performing simple harmonic oscillations in a magnetic field of 0.01 T. Time taken for 10 complete oscillations is: (1) 6.98 s (2) 8.76 s (3) 6.65 s (4) 8.89 s

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