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- Question
The emitter diode is usually
Options- A. Forward-biased
- B. Reverse-biased
- C. Nonconducting
- D. Operating in the breakdwon region
- E. None of the above
- Correct Answer
- Forward-biased
- 1. Suppose the voltage from a power outlet is 120 Vrms. What is the peak voltage?
Options- A. 100 V
- B. 120 V
- C. 170 V
- D. 180 V
- E. None of the above Discuss
- 2. If the base supply voltage increases, the Q point moves
Options- A. down
- B. up
- C. nowhere
- D. off the load line
- E. None of the above Discuss
- 3. As the temperature increases, the current gain
Options- A. increases
- B. decreases
- C. contant
- D. can be any of the above
- E. None of the above Discuss
- 4. Which one of the following statements is true?
Options- A. Power dissipation of a pure capacitor increases with operating frequency
- B. Power dissipation of a pure capacitor decreases with operating frequency
- C. There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
- D. All of the above
- E. None of the above Discuss
- 5. The core of an electromagnet is said to be in saturation when:
Options- A. the core is permitted to move freely within the coil
- B. an increase in current through the coil causes no further increase in the mmf
- C. frequent changes in the direction of current through the coil causes heating effects in the core material
- D. changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
- E. None of the above Discuss
- 6. Assuming 100% efficiency, what is the power being applied to the primary winding of the transformer described in the above question?
Options- A. 200 W
- B. 1000 W
- C. 20 W
- D. 100 W
- E. None of the above Discuss
- 7. The total capacitance of a series capacitor circuit is:
Options- A. equal to the sun of the individual capacitive-reactance values
- B. equal to the sum of the individual capacitance values
- C. equal to the source voltage divided by total current
- D. less than the value of the smallest capacitor
- E. None of the above Discuss
- 8. What is the difference between a conductor and an insulator?
Options- A. A conductor allows current to flow much easier than an insulator does
- B. An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
- C. An insulator allows current to flow much easier than a conductor does
- D. The difference between conductors and insulators depends on how they are used
- E. None of the above Discuss
- 9. To get the Thevenin voltage, you have to
Options- A. Short the load resistor
- B. Open the load resister
- C. Short the voltage source
- D. Open the voltage source
- E. None of the above Discuss
- 10. Which one of the following phrasers best describes flux density?
Options- A. The concentration of lines of magnetic force
- B. The rate of change of the number of lines of magnetic force
- C. The opposition to a build-up of magnetic fields
- D. The force that maintains lines of force
- E. None of the above Discuss
Electronic Principles problems
Search Results
Correct Answer: 170 V
Correct Answer: down
Correct Answer: increases
Correct Answer: There is no meaningful relationship between the power dissipation of a pure capacitor and its operating frequency
Correct Answer: an increase in current through the coil causes no further increase in the mmf
Correct Answer: 200 W
Correct Answer: less than the value of the smallest capacitor
Correct Answer: A conductor allows current to flow much easier than an insulator does
Correct Answer: Short the load resistor
Correct Answer: The concentration of lines of magnetic force
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