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 V
• B. 36 V
• C. 25.6 V
• D. 53.5 V

Answer 1

Answer: (C)

25.6 V

Answer 2

$V_L = 16\, V, V_R = 20\, V$
$\therefore \:\:\:\: V =\sqrt{V_R^2 + V_L^2} = \sqrt{20^2 + 16^2} = 25.6 \,V$