# 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 ________. (a) first quadrant (b) second quadrant (c) third quadrant (d) fourth quadrant

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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