(B) For a purely capacitive circuit,the applied alternating e.m.f. is given by $e = e_0 \sin(\omega t)$.In a capacitor,the current $i$ leads the volta

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Current is ahead of e.m.f. by $\pi / 2$

(B) For a purely capacitive circuit,the applied alternating e.m.f. is given by $e = e_0 \sin(\omega t)$.In a capacitor,the current $i$ leads the voltage $e$ by a phase angle of $\pi / 2$.Therefore,the expression for current is $i = i_0 \sin(\omega t + \pi / 2)$.This indicates that the current is ahead of the e.m.f. by $\pi / 2$.

Class 12 Physics Alternating Current Only Inductor, Only Capacitor and Only Resistor Circuit

Easy

An alternating e.m.f. is applied to a purely capacitive circuit. What is the phase relation between the e.m.f. and the current flowing in the circuit?

AIIMS 1997 All AIIMS

A
e.m.f. is ahead of current by $\pi / 2$
B
Current is ahead of e.m.f. by $\pi / 2$
C
Current lags behind e.m.f. by $\pi$
D
Current is ahead of e.m.f. by $\pi$

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Only Inductor, Only Capacitor and Only Resistor Circuit

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An alternating e.m.f. is applied to a purely capacitive circuit. What is the phase relation between the e.m.f. and the current flowing in the circuit?

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$(i)$ What is the angle between the phasor of $V_R$ and $I$?
$(ii)$ The voltage phasor $V_C$ is ...... of the current phasor $I$. (Fill in the blank)