An emf E = 100 Sin 314t volt Is Applied Across A Pure Capacitor Of 637 . Find The Instantaneous Current i.

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Question

An emf E = 100 sin 314t volt is applied across a pure capacitor of 637 . Find the instantaneous current i.

medium

Solution

Correct option is

20 cos 314t

In a pure capacitor the current leads the voltage by 90^o. Therefore, the instantaneous current is given by

Substituting this value of i₀ in eq. (i), we get

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