To increase the current in a series RL circuit, the frequency cannot be determined without values should be decreased should be increased should be constant TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance decreases increases cannot be determined without values does not change 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 6.76 564 0.564 55.7 TRUE ANSWER : ? YOUR ANSWER : ?
A 47Ω resistor is in series with an inductive reactance of 120Ω across an ac source. The impedance, expressed in polar form, is 120 angle 68.6° 47 angle 68.6° 129 angle 31.4° 129 angle 68.6° 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 A 874 mA 8.74 mA 8.74 A 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 6 A 424 mA TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency is decreased, the impedance of a parallel RL circuit remains constant decreases is not a factor increases 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 doubled not a factor decreased increased 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 200Ω 5.51Ω 55.15Ω 90Ω TRUE ANSWER : ? YOUR ANSWER : ?
Referring to Problem 23, the reactive power is 10 mVAR 148 mVAR 6.76 mVAR 100 mVAR TRUE ANSWER : ? YOUR ANSWER : ?