A magnet is suspended horizontally in the earth's magnetic field. When it is displaced and released, it oscillates in a horizontal plane with a period T . If a piece of wood of same moment of ine

Question

A magnet is suspended horizontally in the earth's magnetic field. When it is displaced and released, it oscillates in a horizontal plane with a period $T$ . If a piece of wood of same moment of inertia as the magnet is attached to the magnet, the new period of oscillation of the system would be

Options:

Answer:

D

Solution:

$T = 2 π \sqrt{\frac{l}{M B_{H}}}$

$T^{'} = 2 π \sqrt{\frac{2 l}{M B_{H}}} = \sqrt{2} T$

TestHub · Accepted Answer

T = 2 π l M B H T ′ = 2 π 2 l M B H = 2 T

Physics - Magnetism Question with Solution | TestHub

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