Question

In a circuit consisting of a capacitance and a generator with alternating emf \(E_g=E_{g}\sin \omega t\), where \(V_C\) and \(I_C\) are the voltage and current. Correct phasor diagram for such circuit is :

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

In a purely capacitive circuit, the current leads the voltage by $\frac{\pi }{2}$ because first, the current flows through the two plates of the capacitor, where the charge is stored, after that the charge accumulates at the plates of the capacitor and causes an establishment of a voltage difference.

Hence, $\left(C\right)$ is the correct answer.