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Q.

What is the phase difference between ac emf and current in the following ?
I) pure resistor II) pure inductor III) pure capacitor

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Detailed Solution

I) In a pure resistor there is no phase difference between ac emf and current
II) In a pure inductor the current lags behind e.m.f by π2 radian or 90°
III) In a pure capacitor the current is ahead of the emf applied across it by π2 radian or 90°

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