Q. Same current is flowing in two alternating circuits. The first circuit contains only inductance and the other contains only a capacitor. If the frequency of the emf of AC is increased, the effect on the value of the current
A) Increases in the first circuit and decreases in the other
B) Increases in both the circuits
C) Decreases in both the circuits
D) Decreases in the first circuit and increases in the other
Explanation
(d) $I_{L} = \frac{V}{X_{L}}\ $and$\ I_{C} = \frac{V}{X_{C}}$
i.e, $I_{L} \propto \frac{1}{\omega}$
and $I_{C} \propto \omega$
$\therefore$ With increase in $\omega,I_{L}$decreases while$\ I_{C}\ $increases$.$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.