An ac signal at a certain frequency is applied across a 40-mH inductor and a 100-Ω resistor. If the power factor of this circuit is 0.40, what is the value of the frequency?
A) 160 Hz
B) 200 Hz
C) 410 Hz
D) 600 Hz
E) 910 Hz

Question

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The Answer of An ac signal at a certain frequency is applied across a 40-mH inductor and a 100-Ω resistor. If the power factor of this circuit is 0.40, what is the value of the frequency?
A) 160 Hz
B) 200 Hz
C) 410 Hz
D) 600 Hz
E) 910 Hz

An Ac Signal at a Certain Frequency Is Applied Across