Basic electronics MCQ question answer Leave a Comment / Electronics Multiple choice question MCQ Share this 0% 24 Created on September 19, 2022Basic electronics Basic electronics 2 1 / 31 Category: Electronics basics 1. Forbidden Energy gap (EG) of a semiconductor in electronic devices depends on which of the following factors? Recombination and Generation Material constant Interatomic distance Electron affinity 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. 2 / 31 Category: Electronics basics 2. Which of the following is correct about photodiode electronic devices? No external voltage is applied Electron-hole pairs are generated by impurity injection in depletion layer It is a photovoltaic cell connected in reverse bias 3 / 31 Category: Electronics basics 3. Which of the following is true about Zener diode? It is lightly doped It is used in forward bias It is used in forward bias It is mostly used in voltage regulator electronic circuits 4 / 31 Category: Electronics basics 4. Which of the following has a negative-resistance region? Schottky diode Optocoupler Step-recovery diode Tunnel diode 5 / 31 Category: Electronics basics 5. For a low voltage rectification: Two diode full-wave rectifier is suitable Bridge rectifier is suitable None Both bridge and full-wave rectifier are suitable 6 / 31 Category: Electronics basics 6. To display the digit 8 in a seven-segment indicator, C must be lighted G must be off All segments must be on F must be on Hint P-N junction diodes have two modes of operations i.e. forward and reverse bias. 7 / 31 Category: Electronics basics 7. Which of the following is wrong about P-N junction diodes used in electronic devices? They can act as ON-OFF switches They have diffusion capacitance at high-frequency AC voltage They have three modes of operations They have dynamic resistance at low-frequency AC voltage 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. 8 / 31 Category: Electronics basics 8. What type of semiconductor is used in LED electronic circuits? Compensated semiconductor Intrinsic semiconductor Compound semiconductor Degenerated semiconductor 9 / 31 Category: Electronics basics 9. Which of the following is the correct order of turn-off times? MOSFET < IGBT < BJT < SCR BJT < MOSFET < IGBT < SCR SCR < BJT < IGBT < MOSFET MOSFET < BJT < IGBT < SCR Electronic devices like MOSFET have the lowest turn-off times (nanoseconds). BJT has turn-off times in between nanoseconds to microseconds. IGBT and SCR have turn-off times of about 1 and 5 microseconds respectively. 10 / 31 Category: Electronics basics 10. Which of the following is not an electronic device? A magnifying glass A keyboard A mobile A computer 11 / 31 Category: Electronics basics 11. The varactor is usually Forward-biased Unbiased Reverse-biased Operated in the breakdown region Hint Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits 12 / 31 Category: Electronics basics 12. Which type of semiconductor is used in Tunnel Diode? Compound semiconducto Degenerated semiconductor Elemental semiconductor Extrinsic semiconductor 13 / 31 Category: Electronics basics 13. A photodiode is normally Reverse-biased Forward-biased Emitting light Neither forward- nor reverse biased 14 / 31 Category: Electronics basics 14. A voltmeter is used: in parallel with the circuit to measure coulombs in series with the circuit to measure current 15 / 31 Category: Electronics basics 15. Which of the following is not a physical component of an electronic circuit? Inductor Temperature Diode Capacitor 16 / 31 Category: Electronics basics 16. One coulomb passing a point in one second is one volt ampere ohm charge 17 / 31 Category: Electronics basics 17. In which of the following region does BJT act as the amplifier electronic device? Cut-off Active Reverse saturation Saturation 18 / 31 Category: Electronics basics 18. f the depletion layer gets wider, the capacitance is variable increases Stays the same Decreases 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. 19 / 31 Category: Electronics basics 19. Mass action law is not valid for which type of semiconductors in electronic devices? Elemental Degenerative Compensated Compound 20 / 31 Category: Electronics basics 20. Which voltage source converts chemical energy to electrical energy? Electronic power supply Solar cell Electrical generator Battery 21 / 31 Category: Electronics basics 21. What is the color code for a 220  5% resistor? Red, Red, Brown, Silver Orange, Orange, Black, Gold Red, Red, Black, Gold Red, Red, Brown, Gold 22 / 31 Category: Electronics basics 22. Current is considered as the movement of electrons protons nuclei charge 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. 23 / 31 Category: Electronics basics 23. Which of the following is wrong about solar cell electronic devices? No external voltage is applied It produces dark current It is a photovoltaic cell Solar cell responsivity is directly proportional to the wavelength of light 24 / 31 Category: Electronics basics 24. Which of the following semiconductor is mostly used to construct electronic circuits? Germanium Selenium Tin Silicon 25 / 31 Category: Electronics basics 25. An example of potential energy is a moving vehicle tea-kettle steam the sun a battery 26 / 31 Category: Electronics basics 26. The term used to designate electrical pressure is voltage voltage conductance resistance 27 / 31 Category: Electronics basics 27. Which resistive component is designed to be temperature sensitive? Thermistor Photoconductive cell Rheostat Potentiometer 28 / 31 Category: Electronics basics 28. When the light increases, the reverse minority carrier current in a photodiode Is unaffected Decreases Increases Reverses direction 29 / 31 Category: Semiconductor diode (PN junction) 29. Which type of diode is work as a Variable Capacitor? Varactor Diode LED Tunnel Diode Photo diode 30 / 31 Category: Electronics basics 30. A blown-fuse indicator uses a Back diode Constant-current diode Zener diode Light-emitting diode 31 / 31 Category: Electronics basics 31. For typical operation, you need to use reverse bias with a All of the above Varactor Photodiode Zener diode Your score is The average score is 31% LinkedIn Facebook Twitter 0% Restart quiz Exit Send feedback Share this