When the frequency of the voltage applied to a series RL circuit is decreased, the impedance decreases
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance decreases
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
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
Which of the following power factors results in less energy loss in an RL circuit?
Which of the following power factors results in less energy loss in an RL circuit?
A 47 Ω resistor is in series with an inductive reactance of 120 Ω across an ac source. The impedance, expressed in polar form, is
A 47 Ω resistor is in series with an inductive reactance of 120 Ω across an ac source. The impedance, expressed in polar form, is
In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.
In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.
The phase angle (?) of a series RL circuit varies directly with frequency.
The phase angle (?) of a series RL circuit varies directly with frequency.
A 470 Ω resistor and a coil with 125 Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is
A 470 Ω resistor and a coil with 125 Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is
A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.
A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.
The power factor indicates how much of the apparent power is reactive power.
The power factor indicates how much of the apparent power is reactive power.
When the frequency is decreased, the impedance of a parallel RL circuit
When the frequency is decreased, the impedance of a parallel RL circuit
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is
A filter passes certain frequencies and rejects others.
A filter passes certain frequencies and rejects others.
Total current in an RL circuit always lags the source voltage.
Total current in an RL circuit always lags the source voltage.
To increase the current in a series RL circuit, the frequency
To increase the current in a series RL circuit, the frequency
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle
The impedance of an RL circuit varies inversely with frequency.
The impedance of an RL circuit varies inversely with frequency.
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit
In an RL circuit, part of the power is resistive and part is reactive.
In an RL circuit, part of the power is resistive and part is reactive.
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
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
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
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
When the frequency is decreased, the impedance of a parallel RL circuit Increases
When the frequency is decreased, the impedance of a parallel RL circuit Increases
When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle
When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle
The resistor voltage in an RL circuit is always out of phase with the current.
The resistor voltage in an RL circuit is always out of phase with the current.
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 ∠0° mA. The source voltage, expressed in polar form, is
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 ∠0° mA. The source voltage, expressed in polar form, is
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
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
A 140 Ω resistor is in parallel with an inductor having 60 Ω inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is
A 140 Ω resistor is in parallel with an inductor having 60 Ω inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is
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 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
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
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
