Common Electronics Information Practice Test 2

Question – 1

1. Circuits can be protected from high voltage surges by using ____________.

  • A. avalanche diodes


  • B. zener diodes


  • C. light emitting diodes


  • D. tunnel diodes


  • Answer:A

  • Answer Explanation:





Question – 2

2. In an RL circuit, when an inductor is added in series with the circuit inductance, the time constant ____________.

  • A. decreases


  • B. increases


  • C. remains same


  • D. rises gradually and suddenly drops


  • Answer:A

  • Answer Explanation:





Question – 3

3. ___________ gate consists of a NOT gate and an OR gate connected in series.

  • A. NAND


  • B. AND


  • C. NOR


  • D. XOR


  • Answer:C

  • Answer Explanation:





Question – 4

4. A potentiometer has __________ connections.

  • A. 2


  • B. 3


  • C. 4


  • D. 6


  • Answer:B

  • Answer Explanation:





Question – 5

5. By ohm’s law, when voltage increases and resistance remains the same, _________.

  • A. the current increases


  • B. the power increases


  • C. the power decreases


  • D. the current decreases


  • Answer:A

  • Answer Explanation:





Question – 6

6. When an incandescent light bulb is operated at a voltage less than the rated voltage, then the bulb will burn ________.

  • A. brighter and last longer


  • B. dimmer and last longer


  • C. brighter but won’t last longer


  • D. dimmer but won’t last longer


  • Answer:B

  • Answer Explanation:





Question – 7

7. The gap formed when an electron jumps to the conduction band from the valence shell is called ________.

  • A. a hole


  • B. an energy gap


  • C. a dopant


  • D. None of the above


  • Answer:A

  • Answer Explanation:





Question – 8

8. When impurities are added in an intrinsic semiconductor, _________ can be controlled.

  • A. resistivity


  • B. electricity


  • C. conductivity


  • D. power


  • Answer:C

  • Answer Explanation:





Question – 9

9. _________ law states that emf depends on the rate of cutting flux.

  • A. Ohm’s


  • B. Kirchhoff’s


  • C. Newton’s


  • D. Faraday’s


  • Answer:D

  • Answer Explanation:





Question – 10

10. When the magnetic field of an inductor gets collapsed, ___________.

  • A. voltage is induced


  • B. voltage remains constant


  • C. current will be doubled


  • D. None of the above


  • Answer:A

  • Answer Explanation:





Question – 11

11. The number of ___________ found in the nucleus determines an atom’s atomic number.

  • A. Protons


  • B. Neutrons


  • C. Electrons


  • D. Shells


  • Answer:A

  • Answer Explanation:





Question – 12

12. Which of the following materials have lots of free electrons?

  • A. Semiconductors


  • B. Filters


  • C. Insulators


  • D. Conductors


  • Answer:D

  • Answer Explanation:





Question – 13

13. When ___________, the current flows in a circuit.

  • A. there is no voltage


  • B. a switch is opened


  • C. a switch is closed


  • D. None of the above


  • Answer:C

  • Answer Explanation:





Question – 14

14. The first shell that is closest to the nucleus can hold a maximum of ________.

  • A. 8 electrons


  • B. 2 electrons


  • C. 2 protons


  • D. 8 protons


  • Answer:B

  • Answer Explanation:





Question – 15

15. The outer shell of an atom is known as the __________.

  • A. valence shell


  • B. electron shell


  • C. sub shell


  • D. nucleus shell


  • Answer:A

  • Answer Explanation:





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