An e.m.f is produced in a coil, which is not connected to an extern...

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An e.m.f is produced in a coil, which is not connected to an external voltage source. This can be due to
\( \mathrm{P} \)
(a) the coil being in a time varying magnetic field.
W
(b) the coil moving in a time varying magnetic field.
(c) the coil moving in a constant magnetic field.
(d) the coil is stationary in external spatially varying magnetic field, which does not change with time.
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