A rectangular coil of 100 turns and size \( 0.1 \mathrm{~m} \times ...

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A rectangular coil of 100 turns and size \( 0.1 \mathrm{~m} \times 0.05 \mathrm{~m} \) is placed perpendicular to a magnetic field of \( 0.1 \mathrm{~T} \).
\( \mathrm{P} \)
If the field drops to \( 0.05 \mathrm{~T} \) in \( 0.05 \mathrm{~s} \), the magnitude
W
of the emf induced in the coil is:
(1) 0.5
(2) 2
(3) 3
(4) 6
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