RL Circuits Online Test – Multiple Choice Questions and Answers 1. If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit doubles halves remains constant cannot be determined without values 2. In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is 42.4 A 4.24 A 6 A 424 mA 3. To increase the current in a series RL circuit, the frequency should be decreased should be constant cannot be determined without values should be increased 4. Which of the following power factors results in less energy loss in an RL circuit? 0.2 0.4 0.8 1 5. When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle cannot be determined decreases increases is not affected 6. When the frequency is decreased, the impedance of a parallel RL circuit is not a factor remains constant increases decreases 7. When the frequency of the voltage applied to a series RL circuit is increased, the phase angle increases cannot be determined without values does not change decreases 8. If a load is purely inductive and the reactive power is 12 VAR, the apparent power is 0 VA 6 VA 12 VA 24 VA 9. As frequency increases both series and parallel RL impedance increase series RL impedance decreases and parallel RL impedance increases both series and parallel RL impedance decrease series RL impedance increases and parallel RL impedance decreases 10. Which of the following statements is true about a lag network? A decrease in frequency causes a decrease in the magnitude of the output voltage A decrease in frequency causes an increase in phase lag An increase in frequency causes an increase in the magnitude of the output voltage An increase in frequency causes an increase in phase lag Loading … Question 1 of 10
