First slide

Phasors and Phasor Diagrams

Question

Statement 1: Capacitor serves as a block for DC and offers an easy path to AC.
Statement 2: Capacitive reactance is inversely proportional to frequency.

Easy

A

Both statements 1 and 2 are correct
B

Statement 1 is correct statement 2 is incorrect
C

Statement 1 is incorrect statement 2 is correct
D

Both statements 1 and 2 are incorrect

Solution

The capacitive reactance of capacitor is given by
$X_{C} = \frac{1}{ωC} = \frac{1}{2 πfC}$
So this is infinite for DC (f = 0) and has a very small value for AC. Therefore, a capacitor blocks DC.

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