A conducting circular loop is placed in a uniform magnetic field \( 0.04 \mathrm{~T} \) with its...
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1A conducting circular loop is placed in a uniform magnetic field \( 0.04 \mathrm{~T} \) with its plane perpendicular to the magnetic field. The radius of the loop starts shrinking at \( 2 \mathrm{mms}^{-1} \). The induced emf in the loop when the radius is \( 2 \mathrm{~cm} \) is
(A) \( 3.2 \pi \mu \mathrm{V} \)
(B) \( 0.8 \pi \mu \mathrm{V} \)
(C) \( 4.8 \pi \mu V \)
(D) \( 1.6 \pi \mu \mathrm{V} \)
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