Question

Same current is flowing in two AC circuits. First contains only inductance and second contains only capacitance. If frequency of AC is increased for both, the current will

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

Hint:

Inductive reactance rises with frequency while capacitive reactance falls with frequency.

Answer 1

The Correct Option is D

Step 1: Inductor
$I\propto\dfrac{1}{f}$ because the induced opposition grows with frequency.

Step 2: Capacitor
$I\propto f$ because the capacitor charges and discharges more often.

Step 3: Result
Current falls in the first circuit and rises in the second, option (D).

Final Answer:
The current falls in the inductor circuit and rises in the capacitor circuit. \[ \boxed{\text{(D) }\text{decrease in first circuit and increase in second}} \]