RC CIRCUITS QUIZ

When the frequency of the source voltage decreases, the impedance of a parallel RC circuit

decreases to zero

decreases

does not change

increases

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YOUR ANSWER : ?

A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?

12.9Ω

73Ω

129Ω

167Ω

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

third quadrant

fourth quadrant

first quadrant

second quadrant

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A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?

14400Ω

37.9Ω

3.7Ω

4800Ω

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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

6 kHz

0 Hz

12 kHz

18 kHz

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

4.24

3.46

2.16

21.63

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A 47Ω resistor and a capacitor with 150Ω of capacitive reactance are in series across an ac source. The impedance, expressed in rectangular form, is

Z = 197Ω

Z = 47Ω + j150Ω

Z = 47Ω – j150Ω

Z = 103Ω

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In the complex plane, the number 4 + j3 is located in the

second quadrant

first quadrant

fourth quadrant

third quadrant

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Point +4 on the complex plane is

4 units below the origin on the j axis

4 units right of the origin on the real axis

4 units above the origin on the j axis

4 units left of the origin on the real axis

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

30°

270°

90°

180°

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