Target Exam

CUET

Subject

Physics

Chapter

Alternating Current

Question:

Three circuits are shown below in which same alternating current is flowing. What will be the effect on currents in three cases respectively if frequency of alternating emf be increased?

Options:

Decrease; decrease; increase

No effect; decrease; increase

Increase; increase; decrease

No effect; decrease; decrease

Correct Answer:

No effect; decrease; increase

Explanation:

The correct answer is Option (2) → No effect; decrease; increase

(i) There will be no effect on current flowing. This is because R is not affected by frequency.

(ii) Current will decrease as inductive resistance. $K_L=ωL=2\pi vL$ will increase with increasing frequency.

(iii) Current will increase as capacitance resistance will decrease on increasing the frequency.