16. When the frequency of the voltage applied to a series RC circuit is increased, the phase angle ________.
(a) increases
(b) decreases
(c) remains the same
(d) becomes erratic
17. When the frequency of the voltage applied to a series RC circuit is decreased, the impedance
(a) increases
(b) decreases
(c) remains the same
(d) doubles
18. A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 kΩ. Current flow in the circuit is ________.
(a) 9.2 mA
(b) 92 mA
(c) 4.6 mA
(d) 460 mA
19. A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z?
(a) 119 Ω
(b) 12.9 Ω
(c) 167 Ω
(d) 73 Ω
20. A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is ________.
(a) 0 Hz
(b) 12 kHz
(c) 6 kHz
(d) 18 kHz
Related Posts
5555555555 8. A 2 kΩ resistor is in series with a 0.015 μF capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle? (a) 73.4 Ω and θ = –19.5° (b) 707 Ω and θ = –19.5° (c) 2121 Ω and θ = –19.5° (d) 734 Ω and θ = –38.9°- 5555555555 19. A 47 Ω resistor and a capacitor with a capacitive reactance of 120 Ω are in series across an ac source. What is the circuit impedance, Z? (a) 129 Ω (b) 12.9 Ω (c) 167 Ω (d) 73 Ω
- 5555555555 11. A capacitor with 150 Ω of capacitive reactance is across an ac source. The impedance, expressed in polar form, is ________. (a) Z = 150 (b) Z = 150 ∠90° Ω (c) Z = 150 ∠–90° Ω (d) Z = 150 ∠180° Ω
- 5555555555 10. A 47 Ω resistor is in series with an inductive reactance of 120 Ω across an ac source. The impedance, expressed in polar form, is ________. (a) 47 ∠68.6° Ω (b) 120 ∠68.6° Ω (c) 129 ∠31.4° Ω (d) 129 ∠68.6° Ω
- 5555555555 10. A 200 Ω resistor, a coil with 30 Ω of reactance, and a capacitor of unknown reactance are in series across an ac source. The circuit is at resonance. Circuit impedance ________. (a) is 230 Ω (b) is 170 Ω (c) is 200 Ω (d) cannot be determined