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

• A. 20.0 V
• B. 25.6 V
• C. 31.9 V
• D. 53.5 V

Answer 1

Answer: (B)

25.6 V

Answer 2

$V = \sqrt{V_{R}^{2} + V_{L}^{2}} = \sqrt{(20)^{2} + (16)^{2}} = \sqrt{656} = 25.6V$