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RL Circuits

RL Circuits
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

0.564
564
6.76
55.7

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RL Circuits
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

13.84 angle 69.4° V
3.84 angle 20.6° V
0.3 angle 20.6° V
12.8 angle 20.6° V

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RL Circuits
If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit

halves
doubles
remains constant
cannot be determined without values

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RL Circuits
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

decreases
cannot be determined without values
does not change
increases

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RL Circuits
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance

increases
does not change
cannot be determined without values
decreases

ANSWER DOWNLOAD EXAMIANS APP

RL Circuits
A 47Ω resistor is in series with an inductive reactance of 120Ω across an ac source. The impedance, expressed in polar form, is

129 angle 31.4°
120 angle 68.6°
47 angle 68.6°
129 angle 68.6°

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