An ac source is connected to a capacitor C. Due to decrease in its operating frequency (a) displacement current increases. (b) displacement current decreases. (c) capacitive reactance remains constant. (d) capacitive reactance decreases.

Answer: (b). XC = (1)/(2π f C) increases when f decreases, so (c) and (d) are wrong. Current I = V/XC = V(2π f C) decreases. Displacement current between the plates equals the conduction current, so it also decreases. So the answer is (b) displacement current decreases.

An ac source is connected to a capacitor C. Due to decrease in its… | NEET 2023

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Pure R, L and C Circuits

An ac source is connected to a capacitor C. Due to decrease in its operating frequency

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Answer: (b)

$X_C = \frac{1}{2\pi f C}$ increases when $f$ decreases, so (c) and (d) are wrong.
Current $I = \frac{V}{X_C} = V(2\pi f C)$ decreases.
Displacement current between the plates equals the conduction current, so it also decreases.
So the answer is (b) displacement current decreases.

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