Exercise: Rc Circuits

Questions for: Rc Circuits

In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is
A:
3 V
B:
27 V
C:
19.2 V
D:
1.9 V
Answer: C
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A positive angle of 30° is equivalent to a negative angle of
A:
–30°
B:
–330°
C:
–60°
D:
–180°
Answer: B
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A 470 resistor and a 0.2 F capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is
A:
212
B:
2.12 mS + j3.14 mS
C:
3.14 mS + j2.12 mS
D:
318.3
Answer: B
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Point +4 on the complex plane is
A:
4 units above the origin on the j axis
B:
4 units below the origin on the j axis
C:
4 units right of the origin on the real axis
D:
4 units left of the origin on the real axis
Answer: C
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In the complex plane, the number 14 – j5 is located in the
A:
first quadrant
B:
second quadrant
C:
third quadrant
D:
fourth quadrant
Answer: D
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