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RC CIRCUITS

RC Circuits
A 12 kΩ resistor is in series with a 0.02 μF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 angle 0° mA, what is the source voltage expressed in polar form?

45.6 V
4.11 V
411.3 V
0.411 V

ANSWER DOWNLOAD EXAMIANS APP

RC Circuits
The complex number 40 angle 55° is equivalent to

55 + j55
40 + j40
22.94 + j32.76
45.88 + j65.52

ANSWER DOWNLOAD EXAMIANS APP

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?

14400Ω
37.9Ω
3.7Ω
4800Ω

ANSWER DOWNLOAD EXAMIANS APP

RC Circuits
A 47Ω resistor and a capacitor with 150Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is

Z = 197Ω
Z = 103Ω
Z = 47Ω – j150Ω
Z = 47Ω + j150Ω

ANSWER DOWNLOAD EXAMIANS APP

RC Circuits
A 2 kΩ resistor and a 0.002 μF capacitor are in series across an ac source. Current in the circuit is 6.50 mA. The true power is

845 mW
84.5 mW
130 mW
13 mW

ANSWER DOWNLOAD EXAMIANS APP
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