Exercise: Rc Circuits

Questions for: Rc Circuits

The power factor (PF) indicates how much of the apparent power is true power.
A:
True
B:
False
C:
D:
Answer: A
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Complex numbers can be added and subtracted but not multiplied or divided.
A:
True
B:
False
C:
D:
Answer: B
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A complex number represents a phasor quantity.
A:
True
B:
False
C:
D:
Answer: A
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When the frequency of the voltage applied to a series RC circuit is decreased, the impedance
A:
increases
B:
decreases
C:
remains the same
D:
doubles
Answer: A
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A capacitor with 150 of capacitive reactance is across an ac source. The impedance, expressed in polar form, is
A:
Z = 150
B:
Z = 15090°
C:
Z = 150 –90°
D:
Z = 150180°
Answer: C
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