Electronic Principles problems
- 1. A diode is in series with 220W. If the voltage across the resister is 4V, what is the current through the diode?
Options- A. 55 A
- B. 55.86 A
- C. 18.2 mA
- D. 16.3 mA
- E. None of the above Discuss
Correct Answer: 18.2 mA
- 2. The merging of a free electron and a hole is called
Options- A. Covalent bonding
- B. Lifetime
- C. Recombination
- D. Thermal energy
- E. None of the above Discuss
Correct Answer: Recombination
- 3. Which one of the following statements is true for voltage in a series circuit?
Options- A. The total voltage is equal to the sum of the individual voltages in a series circuit
- B. The total voltage in a series circuit is equal to the average value of the individual voltages
- C. The total voltage of a series circuit is equal to the total current divided by the total resistance
- D. The total voltage in a series circuit is always less than the value of the smallest voltage
- E. None of the above Discuss
Correct Answer: The total voltage is equal to the sum of the individual voltages in a series circuit
- 4. When the Q point moves along the load line, the voltage increases when the current
Options- A. Decreases
- B. Stays the same
- C. Increases
- D. Can be any of above
- E. None of the above Discuss
Correct Answer: Increases
- 5. If the current gain is 200 and the collector current is 100 mA, the base current is
Options- A. 2 mA
- B. 0.5 mA
- C. 2 A
- D. 200 A
- E. None of the above Discuss
Correct Answer: 0.5 mA
- 6. Two diodes are in series. The first diode has a voltage of 0.75 V and the second has a voltage of 0.8 V. If the current through the first diode is 500 mA, what is the current through the second diode
Options- A. 11 mA
- B. 12 mA
- C. 10 mA
- D. 14 mA
- E. None of the above Discuss
Correct Answer: 10 mA
- 7. A device that converts mechanical pressure to electrical energy is called a:
Options- A. piezoelectric device
- B. solar cell
- C. photodiode
- D. nicad cell
- E. None of the above Discuss
Correct Answer: piezoelectric device
- 8. At room temperature a conductor has low many holes?
Options- A. Same number as free electrons
- B. many
- C. Only those produced by thermal energy
- D. less than the free electrons
- E. None of the above Discuss
Correct Answer: Same number as free electrons
- 9. What is the barrier potential of a silicon diode at room temperature?
Options- A. 0.7V
- B. 0.3V
- C. 1 V
- D. 2 m V per degree Celsius
- E. None of the above Discuss
Correct Answer: 0.7V
- 10. The nucleus of the copper atom contains how many protons?
Options- A. 1
- B. 4
- C. 18
- D. 29
- E. None of the above Discuss
Correct Answer: 29
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