EXAMIANS
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle
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When the frequency is decreased, the impedance of a parallel RL circuit
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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
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If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit
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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
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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
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When the frequency of the voltage applied to a series RL circuit is decreased, the impedance
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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
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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
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If a load is purely inductive and the reactive power is 12 VAR, the apparent power is
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