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