1. In the circuit shown, if the value of the reactive component was increased, how would it change the waveforms?
A. The phase shift between the current and the voltage would increase.
B. The phase shift between the current and the voltage would reverse.
C. The phase shift between the current and the voltage would decrease.
D. The phase shift between the current and the voltage would remain the same.
2. Look at the phasor diagram and the circuit shown. The diagram shows the impedances for the components in the circuit. What is the total impedance of the circuit?
A. 85 Ω
B. 500 Ω
C. 100 Ω
D. 50 Ω
3. In the circuit above, if you placed meter leads between points A and D, what voltage would you measure?
A. 300 V
B. 100 V
C. 0 V
D. 141 V
4. A parallel-tuned circuit is found to have insufficient bandwidth. You can increase the bandwidth of the circuit by
A. increasing circuit resistance.
B. using the conjugate impedance.
C. adding resistance in parallel.
D. increasing the Ω
5. Look at this graph of current and voltage phase relationships. The circuit that produces the illustrated current and voltage phase relationships would be
A. inductive with some resistance.
B. purely inductive.
C. purely capacitive.
D. capacitive with some resistance.
6. The circuit that has the characteristic curve shown in the figure would have a Q of
A. 9.1.
B. 1.5.
C. 30.3.
D. 45.5.
7. Look at the four circuit diagrams shown. Technician A says that Circuit 3 is a low-pass circuit, and that Circuit 4 is a high-pass circuit. Technician B says that Circuit 1 is a band-pass circuit, and that Circuit 2 is a band-reject circuit. Which of the following statements is correct?
A. Both technicians are correct.
B. Only Technician A is correct.
C. Only Technician B is correct.
D. Neither of the two technicians is correct.
8. Two electronics technicians are looking at the characteristic curves shown. Technician A say that Curve 1 is the curve for a low-pass circuit, and that Curve 2 is the curve for a high-pass circuit. Technician B says that Curve 3 is the curve for a band-pass circuit, and that Curve 4 is the curve for a band-reject circuit. Which of the following statements is correct?
A. Both technicians are correct.
B. Only Technician B is correct.
C. Neither of the two technicians is correct.
D. Only Technician A is correct.
9. In the circuit shown, the generator frequency is raised so that it's above resonance. Which of the four labeled waveforms correctly shows the relationship between the voltage and current in the circuit at this time?
A. Waveform 3
B. Waveform 4
C. Waveform 2
D. Waveform 1
10. Two electronics technicians are discussing inductors and capacitors. Technician A says that in a capacitor, energy is stored in the magnetic field. Technician B says that in an inductor, energy is stored in the dielectric material. Which of the following statements is correct?
A. Both technicians are correct.
B. Neither of the two technicians is correct.
C. Only Technician B is correct.
D. Only Technician A is correct.
11. The figure shows a circuit diagram and four labeled waveforms. The generator in the circuit is set to operate at the resonant frequency of the components. Which of the four labeled waveforms correctly shows the relationship between the voltage and current in the circuit?
A. Waveform 2
B. Waveform 1
C. Waveform 3
D. Waveform 4
12. In the circuit shown, if you placed meter leads between points A and C, what voltage would you measure?
A. 200 V
B. 0 V
C. 100 V
D. 141 V
13. The LC network at the output of a power supply is an example of a ____ filter.
A. low-pass
B. band-pass
C. band rejection
D. high-pass
14. Look at the circuit in the figure. This circuit is designed to shunt an interfering signal to ground and prevent it from entering the receiver. What is the frequency of the signal being blocked?
A. 318 kHz
B. 31.8 MHz
C. 31.8 kHz
D. 318 MHz
15. Look at the circuit above. In measuring the voltages across each of the components in the circuit, you find that they're all equal to 100 V. What is the voltage value of the source?
A. 300 V
B. 141 V
C. 100 V
D. 200 V
16. Look at the characteristic response curve in the figure. The circuit that has this characteristic response curve is designed to couple signals between IF stages in an AM receiver. The circuit that has this characteristic curve would have a bandwidth of
A. 15 kHz.
B. 10 kHz.
C. 455 kHz.
D. 50 kHz.
17. In the circuit in shown above, if you placed meter leads between points B and D, what voltage would you measure?
A. 300 V
B. 100 V
C. 141 V
D. 200 V
18. In the circuit shown, suppose that the value of XL is 1000, the value of Xc is 10052, and the value of resistor R1 is 10051. What would be the total current and power in the circuit?
A. 1 A at 300 W
B. 3 A at 0 W
C. 3 A at 900 W
D. 3A at 100 W
19. Two inductors are rated at 150 mH. When you measure the resistance of the two inductors, you find that one has a measured value of 1001 and the other has a measured value of 10 &Omega. Which inductor would you choose to use in a circuit where the narrowest possible bandwidth is required, and why?
A. Use the 10 Ω inductor because it has a lower Q.
B. Use the 100 Ω inductor because it has a lower Q.
C. Use the 100 Ω inductor because it has a higher Q.
D. Use the 10 Ω inductor because it has a higher Q.
20. Look at the circuit in the figure. The inductive reactance of this circuit is 200 the capacitive reactance of C1 is 100 f2, the capacitive reactance of C2 is 100 n, and the value of resistor Ri is 500 n. What is the total impedance of the circuit?
A. 100 Ω
B. 500 Ω
C. 900 Ω
D. 200 Ω