(Solution) - An inductor is connected to a variable frequency ac voltage source -(2025 Original AI-Free Solution)

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An inductor is connected to a variable-frequency ac voltage source.
(a) If the frequency decreases by a factor of 2, the rms current will be (1) 2, (2) 1/2, (3) 4, (4) 1/4times the original rms current. Why?
(b) If the rms cur-rent in an inductor at 40 Hz is 9.0 A, what is its rms cur-rent if the frequency is changed to 120 Hz?