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RL Circuits

RL Circuits
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is

6 VA
12 VA
24 VA
0 VA

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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
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

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RL Circuits
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

218 angle –76° mS
12.60 angle –76° mS
12.18 angle –76° mS
12.18 angle 76° mS

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RL Circuits
A 470Ω resistor and a coil with 125Ω inductive reactance are in parallel. Both components are across a 15 V ac voltage source. Current through the inductor is

152 mA
120 mA
32 mA
12 mA

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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

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

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