First slide

Phasors and Phasor Diagrams

Question

A constant voltage at different frequencies is applied across a capacitance C as shown in the figure.
Which of the following graphs correctly depicts the variation of current with frequency?

Moderate

A
B
C
D

Solution

For capacitive circuits, $X_{C} = \frac{1}{ωC}$
$∴ I = \frac{V}{X_{C}} = VωC \Rightarrow I \propto ω$

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