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)

For series LCR circuit
$V=\sqrt{V_R^2+{\left(V_L-V_C\right)}^2}$
$=\sqrt{(80{)}^2+(40-100{)}^2}$
$=100V$