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  4. The average power dissipated in a pure capacitance AC circuit is

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Q. The average power dissipated in a pure capacitance $AC$ circuit is

J & K CETJ & K CET 2009Alternating Current

Solution:

Average power in AC circuit is given by
$P=V_{r m s} I_{r m s} \cos \phi$
For pure capacitive circuit $\phi=90^{\circ}$
so $P=0 .$