An AC source is connected to a capacitor C. Due to a decrease in its operating frequency:
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Question

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

G1 Physics · Accepted Answer

Step 1: X(C) = 1/(2πfC), so decreasing f increases capacitive reactance. Step 2: For fixed RMS voltage, I(RMS) = V(RMS)/X(C) decreases. Step 3: Displacement current through the dielectric has the same magnitude as circuit current, so it decreases (option A). Final answer: (A) displacement current decreases.