First slide

Phasors and Phasor Diagrams

Question

A capacitor is a perfect insulator for

Easy

A

Alternating currents (AC)
B

Direct currents (DC)
C

Both AC and DC
D

None of these

Solution

$X_{C} = \frac{1}{ωC} = \frac{1}{2 πvC}; For DC v - 0, ∴ X_{C} - \infty$

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