Exercise: Rl Circuits

Questions for: Rl Circuits

Which of the following statements is true if R = 100 omega.gif and XL = 100 omega.gif in the circuit in the given circuit?

A:
Each component drops 5 V.
B:
The impedance equals 200 omega.gif.
C:
The power factor equals 1.
D:
The phase angle equals 45°.
Answer: D
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Which of the following statements is true if R1 opens in the circuit in the given circuit?

A:
IL2 increases.
B:
ZT decreases.
C:
VS increases.
D:
VL1 equals 0 V.
Answer: D
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What is the magnitude of the phase angle between the source voltage and current when a 100 mH inductor with an inductive reactance of 6 komega.gif and a 1 komega.gif resistor are in series with a source?
A:
0.1°
B:
9.0°
C:
61.0°
D:
81.0°
Answer: D
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Which of the following statements is true if the frequency decreases in the circuit in the given circuit?

A:
The phase angle decreases.
B:
VR decreases.
C:
IT decreases.
D:
VS decreases.
Answer: A
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What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
A:
0.001°
B:
2.3°
C:
87.6°
D:
89.9°
Answer: B
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