Exercise: Rc Circuits

Questions for: Rc Circuits

What is the angular difference between +j4 and –j4?
A:
30°
B:
90°
C:
180°
D:
270°
Answer: C
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An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:
A:
R = XC
B:
R > XC
C:
R < XC
D:
R = 5XC
Answer: C
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In a parallel RC circuit, there is 100 mA through the resistive branch and 100 mA through the capacitive branch. The total rms current is
A:
200 mA
B:
100 mA
C:
282 mA
D:
141 mA
Answer: D
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The complex number 6 + j6 is equivalent to
A:
645°
B:
3645°
C:
8.4845°
D:
8.4890°
Answer: C
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What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?
A:
4.24
B:
3.46
C:
2.16
D:
21.63
Answer: D
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