Question

A resistor and an inductor are connected in series to a 220 V A.C. supply. When measured with an A.C. voltmeter, the P.D. across resistor is 140 V. The P.D. across the terminals of the inductor will be nearly-

• A. 150 V
• B. 160 V
• C. 170 V
• D. 180 V

Answer 1

Answer: (C)

170 V

Answer 2

V_supply = 220 V V_R = 140 V

V_L = $\sqrt{(220)^{2}–(140)^{2}}$ = 170 volt