A certain ac signal at $1000 \mathrm {~Hz}$ is applied across an inductor and a $100 - \Omega$ resistor. If the power factor of the circuit is $0.400$, what is the impedance of this circuit?
A) $300 \Omega$
B) $200 \Omega$
C) $100 \Omega$
D) $150 \Omega$
E) $250 \Omega$

Question

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The Answer of A certain ac signal at $1000 \mathrm {~Hz}$ is applied across an inductor and a $100 - \Omega$ resistor. If the power factor of the circuit is $0.400$, what is the impedance of this circuit?
A) $300 \Omega$
B) $200 \Omega$
C) $100 \Omega$
D) $150 \Omega$
E) $250 \Omega$

A Certain Ac Signal At 1000 Hz1000 \mathrm {~Hz}1000 Hz Is Applied Across an Inductor and A

A Certain Ac Signal At $1000 \mathrm {~Hz}$ Is Applied Across an Inductor and A