(B) In an $LCR$ series circuit,the phase angle $\phi$ is given by $\tan \phi = \frac{X_L - X_C}{R}$.Case $1$: If ${X_L} > {X_C}$,then $\tan \phi > 0$,

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Current lags voltage when ${X_C} {X_L}$.

(B) In an $LCR$ series circuit,the phase angle $\phi$ is given by $\tan \phi = \frac{X_L - X_C}{R}$.Case $1$: If ${X_L} > {X_C}$,then $\tan \phi > 0$,which means $\phi$ is positive. In this case,the voltage leads the current,or the current lags the voltage.Case $2$: If ${X_C} > {X_L}$,then $\tan \phi Therefore,when ${X_C} {X_L}$,the current leads the voltage.

Class 12 Physics Alternating Current RL, RC and LC AC Circuits

Medium

In an $LCR$ series circuit,if ${X_C} < {X_L}$ and ${X_C} > {X_L}$,determine whether the current in the circuit leads or lags the voltage.

A
Current leads voltage when ${X_C} < {X_L}$,and lags when ${X_C} > {X_L}$.
B
Current lags voltage when ${X_C} < {X_L}$,and leads when ${X_C} > {X_L}$.
C
Current leads voltage in both cases.
D
Current lags voltage in both cases.

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Alternating Current

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RL, RC and LC AC Circuits

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In an $LCR$ series circuit,if ${X_C} < {X_L}$ and ${X_C} > {X_L}$,determine whether the current in the circuit leads or lags the voltage.

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