Question:
An e.m.f is produced in a coil, which is not connected to an external voltage source. This can be due to
(a) the coil is in a time-varying magnetic field.
(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 an external spatially varying magnetic field, which does not change with time.
Solution:
(a) the coil is in a time-varying magnetic field.
(b) the coil moving in a time-varying magnetic field.
(c) the coil moving in a constant magnetic field.
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