EXAMIANS
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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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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When the frequency of the voltage applied to a series RL circuit is increased, the phase angle
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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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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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Referring to Problem 23, the reactive power is
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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
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When the frequency is decreased, the impedance of a parallel RL circuit
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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
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When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle
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