Engineering Board Exam Reviewer · RL Circuits · medium
A series RL circuit has R=30, and XL=40, . What is its power factor?
- 0.8 lagging
- 0.6 leading
- 0.6 lagging
- 0.75 lagging
Answer
C. 0.6 lagging
Solution
|Z|=sqrt(302+402)=50, . PF=R/|Z|=30/50=0.6. An inductive circuit has a lagging power factor.
More RL Circuits questions
- In a series RL circuit, the resistor voltage is 60 V and the inductor voltage is 80 V. What is the source voltage?
- A coil with 15, of resistance and 50 mH of inductance is connected across a 120 V, 60 Hz supply. Find the current.
- A 100, resistor and a 0.2 H inductor are connected in series across a 60 Hz source. Find the magnitude of the total impedance.
- In the parallel RL circuit shown, a 480 V (rms) source with =500 rad/s feeds R=30, and L=80 mH in parallel. By how many degrees does the…
- In the parallel RL circuit shown, a 480 V (rms) source with =1000 rad/s feeds R=96, and L=40 mH in parallel. Find the magnitude of the…
- In the parallel RL circuit shown, a 60 V (rms) source with =10000 rad/s feeds R=40, and L=3 mH in parallel. Find the total current drawn…
- In the series RL circuit shown, a 400 V (rms) source with =5000 rad/s is connected to R=28, and L=19.2 mH. Find the apparent power…
- In the series RL circuit shown, a 170 V (rms) source with =2000 rad/s is connected to R=150, and L=40 mH. Find the real power dissipated…
- In the series RL circuit shown, a 150 V (rms) source with =1000 rad/s is connected to R=24, and L=18 mH. By how many degrees does the…
- In the series RL circuit shown, a 232 V (rms) source with =500 rad/s is connected to R=84, and L=160 mH. Find the voltage across the…