# RC Circuits – Exercise – 1

RC Circuits » Exercise – 1

1. A 470 Ω resistor and a 0.2 μF capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is ________.

(a) 212 Ω
(b) 2.12 mS + j3.14 mS
(c) 3.14 mS + j2.12 mS
(d) 318.3 Ω

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

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3. 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

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4. A positive angle of 30° is equivalent to a negative angle of ________.

(a) –30°
(b) –330°
(c) –60°
(d) –180°

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5. 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

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