RC Circuits For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is 275 W 195.2 W 25 W 19.52 W 275 W 195.2 W 25 W 19.52 W ANSWER DOWNLOAD EXAMIANS APP
RC Circuits A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z? 129Ω 73Ω 167Ω 12.9Ω 129Ω 73Ω 167Ω 12.9Ω ANSWER DOWNLOAD EXAMIANS APP
RC Circuits A capacitor with 150Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is Z = 150 angle – 90° Ω Z = 150 angle 180° Ω Z = 150 Z = 150 –90° Ω Z = 150 angle – 90° Ω Z = 150 angle 180° Ω Z = 150 Z = 150 –90° Ω ANSWER DOWNLOAD EXAMIANS APP
RC Circuits When the frequency of the source voltage decreases, the impedance of a parallel RC circuit increases decreases does not change decreases to zero increases decreases does not change decreases to zero ANSWER DOWNLOAD EXAMIANS APP
RC Circuits The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency must be increased is held constant has no effect must be decreased must be increased is held constant has no effect must be decreased ANSWER DOWNLOAD EXAMIANS APP
RC Circuits A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 k. Current flow in the circuit is 9.2 mA 92 mA 460 mA 4.6 mA 9.2 mA 92 mA 460 mA 4.6 mA ANSWER DOWNLOAD EXAMIANS APP
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