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- Question
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
- Correct Answer
- increases
- 1. 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
- 2. 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
- 3. A device that converts chemical energy to electrical energy is called a:
Options- A. solar cell
- B. thermocouple
- C. chemical cell
- D. electric device
- E. None of the above Discuss
- 4. Which one of the following statements is true?
Options- A. The secondary voltage for a step-down power transformer is greater than the primary voltage
- B. The secondary current for a step-down power transformer is greater than the primary voltage
- C. Parallel RLC circuit operated below its resonant frequency
- D. purely resistive circuit
- E. None of the above Discuss
- 5. Doubling the diameter of the coil in an inductor:
Options- A. multiplies the value of inductance by two
- B. reduces the value of inductance by one-half
- C. reduces the value of inductance by one-fourth
- D. multiplies the value of inductance by four
- E. None of the above Discuss
- 6. 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
- 7. 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
- 8. 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 Discuss
- 9. 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
- 10. 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
Electronic Principles problems
Search Results
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: chemical cell
Correct Answer: The secondary current for a step-down power transformer is greater than the primary voltage
Correct Answer: multiplies the value of inductance by two
Correct Answer: down
Correct Answer: 170 V
Correct Answer: Forward-biased
Correct Answer: 200 W
Correct Answer: less than the value of the smallest capacitor
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