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