Question

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 e.m.f. is increased, the current will :

• A. increase in first circuit and decrease in the other
• B. increase in both circuits
• C. decrease in both circuits
• D. decrease in first circuit and increase in the other

Answer 1

The correct option is D decrease in first circuit and increase in the other

Impedance is inversely related to current .
For inductor , Impedance $=\omega L$
Hence , $\omega \propto \frac{1}{i}$
As frequency increases , current reduces .
For Capacitor , Impedance $=\frac{1}{\omega C}$
Hence , $\omega \propto i$
As frequency increases , current also increases .