Electronic Principles problems
- 1. Which one of the following equations most directly determines the power dissipation of a resistance when you know the power dissipation of a resistance when you know the voltage drop and current?
Options- A. P = IE
- B. P = E2/R
- C. P = I2R
- D. I = P/E
- E. None of the above Discuss
Correct Answer: P = IE
- 2. A device that converts light energy to electrical energy is called a:
Options- A. thermocouple
- B. solar cell
- C. photodiode
- D. photo transistor
- E. None of the above Discuss
Correct Answer: solar cell
- 3. What kind of battery is most likely included in a cordless electric knife?
Options- A. Zinc-carbon battery
- B. Mercury-cell battery
- C. Nicad battery
- D. Lead-acid battery
- E. None of the above Discuss
Correct Answer: Mercury-cell battery
- 4. Suppose a voltage source has an ideal voltage of 15V and a source resistance of 0.2W. For what values of load resistance will the voltage source appear stiff?
Options- A. 20 Ohm
- B. 30 Ohm
- C. 10 Ohm
- D. 100 Ohm
- E. None of the above Discuss
Correct Answer: 20 Ohm
- 5. A loadstone is:
Options- A. a natural magnet
- B. a temporary magnet
- C. an artificial magnet
- D. a paramagnetic alloy
- E. None of the above Discuss
Correct Answer: a natural magnet
- 6. When operating above its resonant frequency, a series RLC circuit has the characteristics of a:
Options- A. series RL circuit
- B. series RC circuit
- C. series RLC circuit operated below its resonant frequency
- D. purely resistive circuit
- E. None of the above Discuss
Correct Answer: series RL circuit
- 7. What is the power dissipation of a resistance that has 24 V dropped across it and 0.25 A flowing through it?
Options- A. 3 W
- B. 6 W
- C. 64 W
- D. 122 W
- E. None of the above Discuss
Correct Answer: 6 W
- 8. What is a free electron?
Options- A. An electron that has been freed from its parent atom
- B. An electron that costs nothing
- C. An electron that has no electrical charge
- D. An electron that has twice the amount of charge of a normal electron
- E. None of the above Discuss
Correct Answer: An electron that has been freed from its parent atom
- 9. Which one of the following statements regarding ac circuits is correct?
Options- A. Current and voltages are in phase through a resistor
- B. Current leads the voltage through a resistor
- C. Current lags the voltage through a resistor
- D. All of the above
- E. None of the above Discuss
Correct Answer: Current and voltages are in phase through a resistor
- 10. The saturation point is approximately the same as
Options- A. cutoff point
- B. lower end of the load line
- C. upper end of the load line
- D. infinity
- E. None of the above Discuss
Correct Answer: upper end of the load line
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