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The Power Factor of an Ac $R L$ Circuit with A $100 - \Omega$

Question 31

Multiple Choice

The power factor of an ac $R L$ circuit with a $100 - \Omega$ resistor and a certain inductor is $0.60$ . What is the impedance of the circuit?

A) $100 \Omega$
B) $170 \Omega$
C) $85 \Omega$
D) $340 \Omega$
E) $60 \Omega$

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