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Introduction to Semiconductors

A capacitor a...

Question

A capacitor acts as an infinite resistance for

(a) DC
(b) AC
(c) DC as well as AC
(d) neither AC nor DC

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Solution

(a) DC

For a DC source, ω = 0. So, the reactance of the capacitance is given by,
$X_{C} = \frac{1}{ω C} = \frac{1}{0} = \infty$

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