(C) In an $AC$-circuit containing only capacitance,the current always leads the voltage by a phase angle of $90^{\circ}$.This occurs because the charg

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leads the voltage by $90^{\circ}$

(C) In an $AC$-circuit containing only capacitance,the current always leads the voltage by a phase angle of $90^{\circ}$.This occurs because the charge $q$ on the capacitor is related to the voltage $V$ by $q = CV$.The current $I$ is the rate of change of charge,$I = dq/dt = C(dV/dt)$.If $V = V_0 \sin(\omega t)$,then $I = C \omega V_0 \cos(\omega t) = I_0 \sin(\omega t + 90^{\circ})$.Thus,the current leads the voltage by $90^{\circ}$.

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

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In an $AC$-circuit containing only capacitance,the current

AP EAMCET 2021 All AP EAMCET

A
leads the voltage by $180^{\circ}$
B
remains in phase with the voltage
C
leads the voltage by $90^{\circ}$
D
lags the voltage by $90^{\circ}$

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Alternating Current

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Only Inductor, Only Capacitor and Only Resistor Circuit

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In an $AC$-circuit containing only capacitance,the current

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Assertion : No power loss is associated with a pure capacitor in an $AC$ circuit.
Reason : No current is flowing in this circuit.