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 : ?
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 4.24 A 42.4 A 424 mA 6 A 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 5.51Ω 200Ω 90Ω 55.15Ω TRUE ANSWER : ? YOUR ANSWER : ?
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is 12 VA 24 VA 0 VA 6 VA TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following power factors results in less energy loss in an RL circuit? 0.8 1 0.4 0.2 TRUE ANSWER : ? YOUR ANSWER : ?
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 152.6Ω 1526Ω 942Ω 1200Ω TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency is decreased, the impedance of a parallel RL circuit decreases remains constant increases is not a factor TRUE ANSWER : ? YOUR ANSWER : ?
A 1.5 kΩ resistor and a coil with a 2.2 kΩ inductive reactance are in series across an 18 V ac source. The power factor is 55.7 6.76 564 0.564 TRUE ANSWER : ? YOUR ANSWER : ?
A 12 kΩ resistor is in series with a 90 mH coil across an 8 kHz ac source. Current flow in the circuit, expressed in polar form, is I = 0.3 angle 0° mA. The source voltage, expressed in polar form, is 3.84 angle 20.6° V 0.3 angle 20.6° V 13.84 angle 69.4° V 12.8 angle 20.6° V 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 decreased doubled not a factor TRUE ANSWER : ? YOUR ANSWER : ?