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