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