Question

To increase the current in a series RL circuit, the frequency :

• A. cannot be determined without values
• B. should be increased
• C. should be constant
• D. should be decreased

Answer 1

The correct option is D should be decreased

We know that impedence o f RL circuit is given by:-

$X=\sqrt{{\omega }^2{L}^2+R^2}$

And we know that current, $I\propto \frac{1}{X}$

Hence, to increase current , $\omega$ and hence frequency should be decreased.

Answer-(D)