Therefore, the secondary coil that started with zero flux linkage continues to hold
zero flux linkage at all times after that. Thus,
A shorted coil with zero resistance expels flux completely at all frequencies in the
magnetic path where it is located.
It does this by allowing suitable current flow in it in order to cancel the mutual flux
generated by current in the driven coil. Both primary and secondary currents rise
exponentially with a time constant of in step response.
But what if the windings are perfectly coupled in addition? Then,
If v
p
(t) is a unit step function, the current rises instantaneously from 0 to 1/r
p
in the
primary winding and fr ...
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