RC Circuits A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance? 4800Ω 14400Ω 37.9Ω 3.7Ω 4800Ω 14400Ω 37.9Ω 3.7Ω ANSWER DOWNLOAD EXAMIANS APP
RC Circuits A 2 k resistor is in series with a 0.015 F capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle? 73.4 and θ = –19.5° 734 and θ = –38.9° 707 and θ = –19.5° 2121 and θ = –19.5° 73.4 and θ = –19.5° 734 and θ = –38.9° 707 and θ = –19.5° 2121 and θ = –19.5° 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 decreased has no effect must be increased is held constant must be decreased has no effect must be increased is held constant ANSWER DOWNLOAD EXAMIANS APP
RC Circuits The complex number 40 angle 55° is equivalent to 45.88 + j65.52 55 + j55 22.94 + j32.76 40 + j40 45.88 + j65.52 55 + j55 22.94 + j32.76 40 + j40 ANSWER DOWNLOAD EXAMIANS APP
RC Circuits In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is 141 mA 282 mA 100 mA 200 mA 141 mA 282 mA 100 mA 200 mA ANSWER DOWNLOAD EXAMIANS APP
RC Circuits When the frequency of the source voltage decreases, the impedance of a parallel RC circuit increases decreases decreases to zero does not change increases decreases decreases to zero does not change ANSWER DOWNLOAD EXAMIANS APP
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