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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?
3.7Ω
37.9Ω
14400Ω
4800Ω
3.7Ω
37.9Ω
14400Ω
4800Ω
Answer
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Related Question
RC Circuits
An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:
R = XC
R < XC
R > XC
R = 5XC
R = XC
R < XC
R > XC
R = 5XC
Answer
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RC Circuits
A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is
0 Hz
12 kHz
6 kHz
18 kHz
0 Hz
12 kHz
6 kHz
18 kHz
Answer
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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?
411.3 V
45.6 V
0.411 V
4.11 V
411.3 V
45.6 V
0.411 V
4.11 V
Answer
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RC Circuits
In the complex plane, the number 14 – j5 is located in the
first quadrant
fourth quadrant
third quadrant
second quadrant
first quadrant
fourth quadrant
third quadrant
second quadrant
Answer
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RC Circuits
What is the angular difference between +j4 and –j4?
180°
270°
90°
30°
180°
270°
90°
30°
Answer
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