In a series RL circuit, 12 V rms is measured across the resistor, and 14 V rms is measured across the inductor. The peak value of the source voltage is 20 V 18.4 V 26.0 V 2 V TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following power factors results in less energy loss in an RL circuit? 1 0.4 0.2 0.8 TRUE ANSWER : ? YOUR ANSWER : ?
A 140Ω resistor is in parallel with an inductor having 60 inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is 55.15Ω 5.51Ω 200Ω 90Ω TRUE ANSWER : ? YOUR ANSWER : ?
A 3.3 kΩ resistor and a 120 mH coil are in parallel. Both components are across a 2 kHz, 12 V ac source. The total current in the circuit is 874 mA 8.74 mA 8.74 A 874 A TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency is decreased, the impedance of a parallel RL circuit decreases remains constant is not a factor increases TRUE ANSWER : ? YOUR ANSWER : ?
To increase the current in a series RL circuit, the frequency should be increased should be constant cannot be determined without values should be decreased TRUE ANSWER : ? YOUR ANSWER : ?
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is 24 VA 0 VA 12 VA 6 VA TRUE ANSWER : ? YOUR ANSWER : ?
When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle is not affected increases cannot be determined decreases TRUE ANSWER : ? YOUR ANSWER : ?
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit remains constant doubles halves cannot be determined without values TRUE ANSWER : ? YOUR ANSWER : ?
The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is increased not a factor doubled decreased TRUE ANSWER : ? YOUR ANSWER : ?