When the frequency is decreased, the impedance of a parallel RL circuit increases remains constant decreases is not a factor TRUE ANSWER : ? YOUR ANSWER : ?
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit remains constant halves doubles cannot be determined without values TRUE ANSWER : ? YOUR ANSWER : ?
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is 24 VA 12 VA 0 VA 6 VA TRUE ANSWER : ? YOUR ANSWER : ?
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 2 V 20 V 18.4 V 26.0 V TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following power factors results in less energy loss in an RL circuit? 0.4 0.8 1 0.2 TRUE ANSWER : ? YOUR ANSWER : ?
Referring to Problem 23, the reactive power is 148 mVAR 6.76 mVAR 100 mVAR 10 mVAR TRUE ANSWER : ? YOUR ANSWER : ?
A 470Ω resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is 12.18 angle –76° mS 12.60 angle –76° mS 12.18 angle 76° mS 218 angle –76° mS 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 1200Ω 1526Ω 942Ω 152.6Ω 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 424 mA 4.24 A 42.4 A 6 A TRUE ANSWER : ? YOUR ANSWER : ?
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance does not change increases decreases cannot be determined without values TRUE ANSWER : ? YOUR ANSWER : ?