EXAMIANS
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
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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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Which of the following power factors results in less energy loss in an RL circuit?
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To increase the current in a series RL circuit, the frequency
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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 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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The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is
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Referring to Problem 23, the reactive power is
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When the frequency is decreased, the impedance of a parallel RL circuit
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A 47Ω resistor is in series with an inductive reactance of 120Ω across an ac source. The impedance, expressed in polar form, is
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