Discussion
Home ‣ Computer Science ‣ Electronic Principles Comments
- Question
Current and voltage are said to be in phase when:
Options- A. their waveforms are both ac or both dc
- B. they have the same amplitude and frequency
- C. their waveforms cross through zero and reach positive and negative peaks at the same time
- D. All of the above
- E. None of the above
- Correct Answer
- their waveforms cross through zero and reach positive and negative peaks at the same time
- 1. When a parallel 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
- 2. What is the impedance of a circuit composed of a 100 ohm resistor connected in parallel with an inductor that has a reactance of 200 W?
Options- A. 77.7 ohm
- B. 89.3 ohm
- C. 88.8 ohm
- D. 224 ohm
- E. None of the above Discuss
- 3. Which one of. the following phrases most accurately describes the nature of a pulsating dc voltage?
Options- A. The voltage remains at one polarity and at a steady level
- B. The voltage remains at one polarity but changes value periodically
- C. The voltage causes current to flow in two directions at the same time
- D. The voltage reverses polarity periodically
- E. None of the above Discuss
- 4. The transistor has a collector current of 2 mA. If the current gain is 135, what is the base current?
Options- A. 14.8 ľA
- B. 10.3 ľA
- C. 7.8 ľA
- D. 7.75 ľA
- E. None of the above Discuss
- 5. A basic capacitor is composed of:
Options- A. two conductors separated by a dielectric
- B. two dielectrics separated by a conductor
- C. two coils separated by a dielectric
- D. two coils separated by a conductor
- E. None of the above Discuss
- 6. The Thevenin resistance is equal in value to the
Options- A. Load resistance
- B. Half the load resistance
- C. Internal resistance of a Morton circuit
- D. Open-load resistance
- E. None of the above Discuss
- 7. Which one of the following statements is true for the currents in a parallel RL circuit?
Options- A. The total current is equal to the sum of the currents through the resistance and inductance
- B. The current always has the same amplitude and phase for every part of the circuit
- C. The total current is less than the sum of the currents through the resistance and inductance
- D. The total current leads the total voltage by less than 90
- E. None of the above Discuss
- 8. For normal operation of the transistor, the collector diode has to be
Options- A. Forward-biased
- B. Reverse-biased
- C. Nonconducting
- D. Operating in the breakdown region
- E. None of the above Discuss
- 9. The primary impedance of a transformer is 60 ohm and the secondary impedance is 120 ohm. What is the impedance ratio?
Options- A. 0.25
- B. 180
- C. 0.5
- D. 4
- E. None of the above Discuss
- 10. Most AC power is obtained from:
Options- A. generators
- B. batteries
- C. oscillators
- D. lightning
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: inductive reactance is equal to the capacitive reactance
Correct Answer: 89.3 ohm
Correct Answer: The voltage remains at one polarity but changes value periodically
Correct Answer: 14.8 ľA
Correct Answer: two conductors separated by a dielectric
Correct Answer: Load resistance
Correct Answer: The total current is less than the sum of the currents through the resistance and inductance
Correct Answer: Reverse-biased
Correct Answer: 0.5
Correct Answer: oscillators
Comments
There are no comments.More in Computer Science:
Programming
Copyright ŠCuriousTab. All rights reserved.