Question

The value of alternating emf $E$ in the given circuit will be

• A. 220 V
• B. 140 V
• C. 100 V
• D. 20 V

Answer 1

Answer: (C)

100 V

Answer 2

For series LCR circuit
$V=\sqrt{V_{R}^{2}+\left(V_{L}-V_{C}\right)^{2}}$
$=\sqrt{(80)^{2}+(40-100)^{2}}$
$=100 \,V$