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RC Circuits
When the frequency of the voltage applied to a series RC circuit is increased, the phase angle
increases
decreases
remains the same
becomes erratic
increases
decreases
remains the same
becomes erratic
Answer
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Related Question
RC Circuits
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit
increases
does not change
decreases
decreases to zero
increases
does not change
decreases
decreases to zero
Answer
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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?
4800Ω
37.9Ω
14400Ω
3.7Ω
4800Ω
37.9Ω
14400Ω
3.7Ω
Answer
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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?
707 and θ = –19.5°
2121 and θ = –19.5°
734 and θ = –38.9°
73.4 and θ = –19.5°
707 and θ = –19.5°
2121 and θ = –19.5°
734 and θ = –38.9°
73.4 and θ = –19.5°
Answer
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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
19.52 W
25 W
195.2 W
275 W
19.52 W
25 W
195.2 W
Answer
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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 = 5XC
R = XC
R > XC
R < XC
R = 5XC
R = XC
R > XC
Answer
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