Eddy currents are produced, when (1) a metal is kept in varying magnetic field \( \mathrm{P} \) ...

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Eddy currents are produced, when
(1) a metal is kept in varying magnetic field
\( \mathrm{P} \)
(2) a metal is kept in a steady magnetic field
W
(3) a circular coil is placed in a magnetic field
(4) through a circular coil current is passed
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