Question

In an ac circuit with XL and R in series, the 

A. Voltages across R and XL are in phase 

B. Voltage across R lags the voltage across XL by 90° 

C. Voltages across R and XL are 180° out-of-phase 

D. Voltage across R leads the voltage across XL by 90°

Answer 1

In an ac circuit with XL and R in series, the voltage across R lags the voltage across XL by 90°.