Common Electronics Information Practice Test 4

Question – 1

1. Which of the following time constant is considered for a capacitor to be fully charged?

  • A. Second


  • B. Third


  • C. Fourth


  • D. Fifth


  • Answer:D

  • Answer Explanation:





Question – 2

2. A diode under normal conditions conducts current when it is _________.

  • A. Forward biased


  • B. Avalanched


  • C. Reverse biased


  • D. Inducted


  • Answer:A

  • Answer Explanation:





Question – 3

3. An adjustable voltage divider is a potentiometer application which is also known as ____________.

  • A. Current control


  • B. Voltage control


  • C. Resistance control


  • D. Volume control


  • Answer:D

  • Answer Explanation:





Question – 4

4. When the forward current through a silicon diode increases, the internal resistance ______.

  • A. decreases


  • B. increases


  • C. remains the same


  • D. increases initially and then decreases


  • Answer:A

  • Answer Explanation:





Question – 5

5. Find the voltage required for 40A to flow through a 70 k?? resistance?

  • A. 2.8 KV


  • B. 2800 V


  • C. 2.8 MV


  • D. 28 KV


  • Answer:C

  • Answer Explanation:





Question – 6

6. Which of the following is considered to be a capacitor’s rate of charge?

  • A. A circuit block


  • B. Exponential


  • C. Linear


  • D. Parallel


  • Answer:B

  • Answer Explanation:





Question – 7

7. What would be the result if the series current doubles?

  • A. Voltage is reduced


  • B. Resistance is halved


  • C. Voltage is doubled


  • D. Resistance is doubled


  • Answer:B

  • Answer Explanation:





Question – 8

8. __________ is the function performed by a diode.

  • A. Amplifier


  • B. Rectifier


  • C. Inverter


  • D. Emitter


  • Answer:B

  • Answer Explanation:





Question – 9

9. The two main applications for an alternating current are __________.

  • A. Power and information


  • B. Static and dynamic


  • C. Magnetic and electric


  • D. None of the above


  • Answer:A

  • Answer Explanation:





Question – 10

10. The unit of electrical resistance is __________.

  • A. Volt


  • B. Amp


  • C. Hertz


  • D. Ohm


  • Answer:D

  • Answer Explanation:





Question – 11

11. __________ is a device used to convert direct current to alternating current.

  • A. Oscillator


  • B. Rectifier


  • C. Diode


  • D. Insulator


  • Answer:A

  • Answer Explanation:





Question – 12

12. A coil that consumes the electrical energy stores it in the form of _________.

  • A. An electric field


  • B. A magnetic field


  • C. An electromotive field


  • D. An electrostatic field


  • Answer:B

  • Answer Explanation:





Question – 13

13. The process of increasing the number of turns of wire on the secondary of a transformer results in __________.

  • A. an increase in the primary current


  • B. an increase in the secondary current


  • C. a decrease in the secondary current


  • D. no change


  • Answer:C

  • Answer Explanation:





Question – 14

14. In which of the following are the zener diodes commonly used?

  • A. Current limiting circuits


  • B. Oscillator circuits


  • C. Amplifier circuits


  • D. Power supply circuits


  • Answer:D

  • Answer Explanation:





Question – 15

15. What is the frequency of the second harmonic of 70 Hz?

  • A. 70 Hz


  • B. 35 Hz


  • C. 140 Hz


  • D. 490 Hz


  • Answer:C

  • Answer Explanation:





Score: 0/10



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