# Home / EEE / RC Circuits :: General Questions

### EEE :: RC Circuits

1. In the complex plane, the number 14 – j5 is located in the   3. Point +4 on the complex plane is

4.  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   5. A 470 resistor and a 0.2 F capacitor are in parallel across a 2.5 kHz ac source. The admittance, Y, in rectangular form, is

6.  A. 212 B. 2.12 mS + j3.14 mS C. 3.14 mS + j2.12 mS D. 318.3    7. A positive angle of 30° is equivalent to a negative angle of

8.  A. –30° B. –330° C. –60° D. –180°   9. 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

10.  A. 3 V B. 27 V C. 19.2 V D. 1.9 V   11. A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is

12.  A. 0 Hz B. 12 kHz C. 6 kHz D. 18 kHz   13. The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency

14.  A. must be increased B. must be decreased C. is held constant D. has no effect   15. In the complex plane, the number 4 + j3 is located in the   17. When the frequency of the source voltage decreases, the impedance of a parallel RC circuit

18.  A. increases B. decreases C. does not change D. decreases to zero   19. A 47 resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?

20.  A. 129 B. 12.9 C. 167 D. 73    