RC CIRCUITS QUIZ

Point +4 on the complex plane is

4 units below the origin on the j axis

4 units above the origin on the j axis

4 units right of the origin on the real axis

4 units left of the origin on the real axis

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A positive angle of 30° is equivalent to a negative angle of

–180°

–330°

–30°

–60°

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In the complex plane, the number 14 – j5 is located in the

third quadrant

first quadrant

second quadrant

fourth quadrant

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The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency

must be decreased

has no effect

is held constant

must be increased

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The complex number 40 angle 55° is equivalent to

55 + j55

45.88 + j65.52

40 + j40

22.94 + j32.76

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What is the angular difference between +j4 and –j4?

30°

180°

270°

90°

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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?

2121 and θ = –19.5°

707 and θ = –19.5°

73.4 and θ = –19.5°

734 and θ = –38.9°

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What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?

4.24

2.16

3.46

21.63

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A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is

0 Hz

12 kHz

18 kHz

6 kHz

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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

100 mA

200 mA

141 mA

282 mA

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