To increase the current in a series RL circuit, the frequency
A. Should be increased
B. Should be decreased
C. Should be constant
D. Cannot be determined without values
Select an option to see the answer and solution.
When the frequency is decreased, the impedance of a parallel RL circuit Increases
Select an option to see the answer and solution.
The resistor voltage in an RL circuit is always out of phase with the current.
Select an option to see the answer and solution.
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle
A. Decreases
B. Increases
C. Does not change
D. Cannot be determined without values
Select an option to see the answer and solution.
The impedance of an RL circuit varies inversely with frequency.
Select an option to see the answer and solution.
Which of the following power factors results in less energy loss in an RL circuit?
Select an option to see the answer and solution.
A 470 Ω 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
A. 12.60 ∠-76° mS
B. 12.18 ∠76° mS
C. 218 ∠-76° mS
D. 12.18 ∠-76° mS
Select an option to see the answer and solution.
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
A. 6 A
B. 424 mA
C. 4.24 A
D. 42.4 A
Select an option to see the answer and solution.
A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.
Select an option to see the answer and solution.