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- Question
What is one important thing transistors do?
Options- A. Emit light
- B. Amplify weak signals
- C. Regulate voltage
- D. Rectify line voltage
- E. None of the above
- Correct Answer
- Amplify weak signals
- 1. A low-pass filter:
Options- A. passes lower-frequency signals and reduces higher-frequency signals
- B. passes higher-frequency signals and reduces lower-frequency signals
- C. has no effect on ac signals
- D. reduces the level of all frequencies by a significant amount
- E. None of the above Discuss
- 2. A step-up transformer has a turns ratio of 1:4. If the line voltage is 115 V rms, what is the peak secondary voltage?
Options- A. 700 V
- B. 707 V
- C. 651 V
- D. 208 V
- E. None of the above Discuss
- 3. The net charge of a neutral copper atom is
Options- A. 0
- B. +1
- C. -1
- D. +4
- E. None of the above Discuss
- 4. The equivalent of 1 kV is:
Options- A. 1.00 V
- B. 1000 V
- C. 100 mV
- D. 1000 mV
- E. None of the above Discuss
- 5. Which one of the following properties of a magnetic circuit can be directly compared to current in an electrical circuit?
Options- A. Number of lines of force
- B. Flux density
- C. Reluctance
- D. Magnetomotive force
- E. None of the above Discuss
- 6. When a series RLC circuit is operating at its resonant frequency:
Options- A. capacitive reactance is greater than the inductive reactance
- B. inductive reactance is greater than the capacitive reactance
- C. inductive reactance is equal to the capacitive reactance
- D. the difference between inductive and capacitive reactance is equal to the resistance
- E. None of the above Discuss
- 7. When operating below its resonant frequency, a parallel RLC circuit has the characteristics of a:
Options- A. parallel RL circuit
- B. parallel RC circuit
- C. parallel RLC circuit operated above its resonant frequency
- D. purely resistive circuit
- E. None of the above Discuss
- 8. Doubling the operating frequency of a capacitive circuit:
Options- A. doubles the amount of a capacitive reactance
- B. has no effect on the capacitive reactance
- C. cuts the capacitive reactance in half
- D. multiplies the capacitive reactance by 6.28
- E. None of the above Discuss
- 9. A step-down transformer has turns ration of 5:1. If the primary voltage is 120 Vrms, what is the secondary voltage?
Options- A. 12 V
- B. 18 V
- C. 24 V
- D. 30 V
- E. None of the above Discuss
- 10. Which one of the following statements applies to common, non-rechargeable flashlight batteries?
Options- A. Common flashlight batteries are secondary wet-cell batteries
- B. Common flashlight batteries are primary wet-cell batteries
- C. Common flashlight batteries are primary dry-cell batteries
- D. Common flashlight batteries are secondary dry-cell batteries
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: passes lower-frequency signals and reduces higher-frequency signals
Correct Answer: 651 V
Correct Answer: +1
Correct Answer: 1000 V
Correct Answer: Number of lines of force
Correct Answer: inductive reactance is equal to the capacitive reactance
Correct Answer: parallel RL circuit
Correct Answer: cuts the capacitive reactance in half
Correct Answer: 24 V
Correct Answer: Common flashlight batteries are primary dry-cell batteries
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