Question 453: AC fundamentals

Question

Given below are two statements
Statement I : In an a.c circuit, the current through a capacitor leads the voltage across it.
Statement II : In a.c circuit containing pure capacitance only, the phase difference between the current and voltage is $$\pi$$.
In the light of the above statements, choose the most appropriate answer from the options given below

Accepted Answer

$$V = {V_0}\sin \omega t$$
$$V = {q \over C}$$
$$q = CV\sin \omega t$$
$${{dq} \over {dt}} = CV{d \over {dt}}\sin \omega t$$
$$i = CV\omega \cos \omega t$$
$$i = CV\omega \sin \left( {\omega t + {\pi  \over 2}} \right)$$
In a.c circuit current lead by voltage by a phase $${\pi  \over 2}$$
Thus statement I is correct while II is incorrect.

Answer

Statement I is incorrect but Statement II is correct

Answer

Both Statement I and Statement II are correct

Answer

Both Statement I and Statement II are incorrect

Answer

Statement I is correct but Statement II is incorrect

AC fundamentals

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