Basic electronics MCQ question answer

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Basic electronics

Basic electronics 2

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Category: Electronics basics

1. Forbidden Energy gap (EG) of a semiconductor in electronic devices depends on which of the following factors?

Hint

Photo diode is a photoconductive cell. External voltage is applied and P-N junction is connected in reverse bias. Electron-hole pairs are generated by photons in the depletion layer.

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Category: Electronics basics

2. Which of the following is correct about photodiode electronic devices?

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Category: Electronics basics

3. Which of the following is true about Zener diode?

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Category: Electronics basics

4. Which of the following has a negative-resistance region?

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Category: Electronics basics

5. For a low voltage rectification:

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Category: Electronics basics

6. To display the digit 8 in a seven-segment indicator,

Hint

P-N junction diodes have two modes of operations i.e. forward and reverse bias.

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Category: Electronics basics

7. Which of the following is wrong about P-N junction diodes used in electronic devices?

Hint

LEDs need compound type semiconductors because they have direct band gap. In direct band gap, photons are easily generated when electrons release energy during recombination.

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Category: Electronics basics

8. What type of semiconductor is used in LED electronic circuits?

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Category: Electronics basics

9. Which of the following is the correct order of turn-off times?

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Category: Electronics basics

10. Which of the following is not an electronic device?

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Category: Electronics basics

11. The varactor is usually

Hint

Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits

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Category: Electronics basics

12. Which type of semiconductor is used in Tunnel Diode?

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Category: Electronics basics

13. A photodiode is normally

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Category: Electronics basics

14. A voltmeter is used:

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Category: Electronics basics

15. Which of the following is not a physical component of an electronic circuit?

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Category: Electronics basics

16. One coulomb passing a point in one second is one

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Category: Electronics basics

17. In which of the following region does BJT act as the amplifier electronic device?

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Category: Electronics basics

18. f the depletion layer gets wider, the capacitance

Hint

Mass action law is related to the concentration of electrons and holes in a semiconductor. Degenerative type semiconductors show similar behavior to metal. So, Mass action law is not valid for them.

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Category: Electronics basics

19. Mass action law is not valid for which type of semiconductors in electronic devices?

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Category: Electronics basics

20. Which voltage source converts chemical energy to electrical energy?

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Category: Electronics basics

21. What is the color code for a 220 omega.gif 5% resistor?

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Category: Electronics basics

22. Current is considered as the movement of

Hint

Solar cell is a photovoltaic cell. No external voltage is applied and solar cell responsivity is directly proportional to the wavelength of the incident light. It doesn’t produce dark current.

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Category: Electronics basics

23. Which of the following is wrong about solar cell electronic devices?

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Category: Electronics basics

24. Which of the following semiconductor is mostly used to construct electronic circuits?

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Category: Electronics basics

25. An example of potential energy is

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Category: Electronics basics

26. The term used to designate electrical pressure is

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Category: Electronics basics

27. Which resistive component is designed to be temperature sensitive?

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Category: Electronics basics

28. When the light increases, the reverse minority carrier current in a photodiode

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Category: Semiconductor diode (PN junction)

29. Which type of diode is work as a Variable Capacitor?

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Category: Electronics basics

30. A blown-fuse indicator uses a

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Category: Electronics basics

31. For typical operation, you need to use reverse bias with a

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