First slide

Magnetic dipole in a uniform magnetic field

Question

The magnet suspended in uniform magnetic field is heated so as to reduce its magnetic moment by 19%. By doing this, the time period of the magnet will

Moderate

Solution

$\frac{T^{1}}{T} = \sqrt{\frac{M}{M^{1}}} = \sqrt{\frac{100}{81}} = \frac{10}{9} \frac{T^{1} - T}{T} x 100 = (\frac{10}{9} - 1) x 100 = 11 % ↑$

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