Question

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Answer 1

Answer:

When a electric current is flowing in an inductor, there is energy stored in the magnetic field. Considering a pure inductor L, the instantaneous power which must be supplied to initiate the current in the inductor is

P=iv= Li(di/dt)

so the energy input to build to a final current i is given by the integral

Energy stored=integration of P dt

=integration of Li. di

=½LI²

WORK DONE=½LI²

HENCE PROVED

Explanation:

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