First slide

AC Circuits

Question

In an ac circuit, the potential difference across an inductance and resistance joined in series are respectively 16 V and 20 V. The total potential difference across the circuit is

Moderate

A

20.0 V
B

25.6 V
C

31.9 V
D

53.5 V

Solution

$V = \sqrt{V_{R}^{2} + V_{L}^{2}} = \sqrt{{(20)}^{2} + {(16)}^{2}} = \sqrt{656} = 25 .6 V$

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