Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Alternating Current

Question:

An A.C. voltmeter reads 20 V across a resister, 30 V across an inductor and 15 V across a capacitor in LCR series circuit. In this case the supply voltage will be

Options:

100 V 

60 V

50 V 

25 V

Correct Answer:

25 V

Explanation:

Supply Voltage $ V = \sqrt { V_R^2 + (V_L - V_C)^2} = \sqrt {20^2 + 15^2} = \sqrt {625} = 25V$