Electronic Principles problems
- 1. What causes the depletion layer?
Options- A. Doping
- B. Recombination
- C. Barrier potential
- D. Ions
- E. None of the above Discuss
Correct Answer: Barrier potential
- 2. When applying a square waveform to a capacitor, the circuit tends to:
Options- A. peak the voltage and round off the current waveforms
- B. peak the current and round off the voltage waveforms
- C. round off both the voltage and current waveforms
- D. peak both the voltage and current waveforms
- E. None of the above Discuss
Correct Answer: peak the current and round off the voltage waveforms
- 3. What is the algebraic sum of this series of values:+2, -3, -6,+4?
Options- A. -6
- B. -3
- C. 0
- D. +2
- E. None of the above Discuss
Correct Answer: -3
- 4. Which one of the following equations most directly leads to the resistance of an ordinary household light bulb, assuming that you know the power and voltage rating?
Options- A. R = E2/P
- B. P = PR
- C. P = E2/R
- D. I = P/E
- E. None of the above Discuss
Correct Answer: R = E2/P
- 5. What is the total resistance of a parallel circuit that contains two resistors having values of 220 ohm and 470 ohm?
Options- A. 220 ohm
- B. 150 ohm
- C. 445 ohm
- D. 690 ohm
- E. None of the above Discuss
Correct Answer: 150 ohm
- 6. Which one of the following principles best describes the basic operation of a generator?
Options- A. Like magnetic poles repel; unlike poles attract
- B. Current is induced in a conductor that is moving through a magnetic field
- C. Like magnetic poles attract; unlike poles repel
- D. Current flowing through a conductor generates a magnetic field
- E. None of the above Discuss
Correct Answer: Current is induced in a conductor that is moving through a magnetic field
- 7. 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
Correct Answer: Number of lines of force
- 8. 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
Correct Answer: 1000 V
- 9. The net charge of a neutral copper atom is
Options- A. 0
- B. +1
- C. -1
- D. +4
- E. None of the above Discuss
Correct Answer: +1
- 10. 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
Correct Answer: 651 V
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