Question

In a series RL circuit, 12 V rms is measured across the resistor, and 14 V rms is measured across the inductor. The peak value of the source voltage is :

• A. 20 V
• B. 18.4 V
• C. 26.0 V
• D. 2 V

Answer 1

The correct option is C 26.0 V

We know that:-

$E_{rms}=\sqrt{V_L^2+V_R^2}$

$⟹E_{rms}=\sqrt{{12}^2+{14}^2}=\sqrt{340}V$

$E_{max}=E_{rms}\sqrt{2}$

$E_{max}=\sqrt{680}V$

$⟹E_{max}=26.0V$

Answer-(C)