A 1.2 kΩ resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is
A. 152.6 Ω
B. 1,526 Ω
C. 1,200 Ω
D. 942 Ω
Answer: Option B
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Related Questions on RL Circuits
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit
A. Doubles
B. Halves
C. Remains constant
D. Cannot be determined without values
When the frequency is decreased, the impedance of a parallel RL circuit
A. Increases
B. Decreases
C. Remains constant
D. Is not a factor
Xl=2ևfL=942
Z=1.2*1000+j942
The magnitude is square root of 1200^2+942^2