6. A 15 Ω resistor, an inductor with 8 Ω inductive reactance, and a capacitor with 12 Ω capacitive reactance are in parallel across an ac voltage source. The circuit impedance is ________.
(a) 12.7 Ω
(b) 127 Ω
(c) 4,436 Ω
(d) 6,174 Ω
7. A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is ________.
(a) 60 V
(b) 660 V
(c) 30 V
(d) 300 V
8. A resonant circuit has a lower critical frequency of 7 kHz and an upper critical frequency of 13 kHz. The bandwidth of the circuit is ________.
(a) 7 kHz
(b) 13 kHz
(c) 20 kHz
(d) 6 kHz
9. A 9 mH coil is in parallel with a 0.015 μF capacitor across an 18 kHz ac source. The coil’s internal resistance, RW, is 60 Ω. The circuit impedance is ________.
(a) 17,340 Ω
(b) 1,734 Ω
(c) 290 Ω
(d) 1,018 Ω
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
Related Posts
5555555555 21. A 120 Ω load is connected across a voltage source with VS = 12 V and RS = 8 Ω. The voltage across the load is ________. (a) 11.25 V (b) 0 V (c) 12 V (d) 1.13 V- AC Circuits » Exercise - 18. A series AC circuit has a resistance of 12 Ω and reactance 5 Ω. The impedance of circuit is : (a) 5 Ω (b) 12 Ω (c) 13 Ω (d) 17 Ω
- 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 32. A certain voltage source has the values VS = 30 V and RS = 6 Ω. The values for an equivalent current source are ________. (a) 5 A, 6 Ω (b) 30 A, 6 Ω (c) 5 A, 30 Ω (d) 30 A, 5 Ω
- 5555555555 22. A 120 Ω load is connected across an ideal voltage source with VS = 12 V. The voltage across the load ________. (a) is 0 V (b) is 12 V (c) is 120 V (d) cannot be determined