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. The varactor is usually Operated in the breakdown region Reverse-biased Unbiased Forward-biased 2 / 31 Category: Electronics basics 2. Which of the following is not a physical component of an electronic circuit? Temperature Capacitor Diode Inductor P-N junction diodes have two modes of operations i.e. forward and reverse bias. 3 / 31 Category: Electronics basics 3. 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 dynamic resistance at low-frequency AC voltage They have three modes of operations They can act as ON-OFF switches 4 / 31 Category: Electronics basics 4. A voltmeter is used: to measure current in series with the circuit in parallel with the circuit to measure coulombs 5 / 31 Category: Electronics basics 5. Which of the following is not an electronic device? A magnifying glass A keyboard A computer A mobile 6 / 31 Category: Electronics basics 6. A photodiode is normally Emitting light Reverse-biased Forward-biased Neither forward- nor reverse biased 7 / 31 Category: Electronics basics 7. Which of the following is the correct order of turn-off times? BJT < MOSFET < IGBT < SCR MOSFET < BJT < IGBT < SCR SCR < BJT < IGBT < MOSFET 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. 8 / 31 Category: Electronics basics 8. In which of the following region does BJT act as the amplifier electronic device? Saturation Active Cut-off Reverse saturation 9 / 31 Category: Electronics basics 9. A blown-fuse indicator uses a Zener diode Constant-current diode Light-emitting diode Back 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. 10 / 31 Category: Electronics basics 10. Mass action law is not valid for which type of semiconductors in electronic devices? Compensated Elemental Compound Degenerative 11 / 31 Category: Electronics basics 11. When the light increases, the reverse minority carrier current in a photodiode Increases Reverses direction Is unaffected Decreases 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. 12 / 31 Category: Electronics basics 12. Which of the following is wrong about solar cell electronic devices? No external voltage is applied It produces dark current Solar cell responsivity is directly proportional to the wavelength of light It is a photovoltaic cell 13 / 31 Category: Electronics basics 13. What is the color code for a 220 5% resistor? Orange, Orange, Black, Gold Red, Red, Brown, Gold Red, Red, Brown, Silver Red, Red, Black, Gold 14 / 31 Category: Electronics basics 14. The term used to designate electrical pressure is conductance resistance voltage voltage 15 / 31 Category: Electronics basics 15. Which of the following semiconductor is mostly used to construct electronic circuits? Silicon Germanium Tin Selenium 16 / 31 Category: Electronics basics 16. Which voltage source converts chemical energy to electrical energy? Electronic power supply Battery Solar cell Electrical generator 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? connected in reverse bias No external voltage is applied It is a photovoltaic cell Electron-hole pairs are generated by impurity injection in depletion layer 18 / 31 Category: Electronics basics 18. For typical operation, you need to use reverse bias with a Zener diode Photodiode Varactor All of the above 19 / 31 Category: Electronics basics 19. Which of the following has a negative-resistance region? Step-recovery diode Optocoupler Schottky diode Tunnel diode 20 / 31 Category: Electronics basics 20. f the depletion layer gets wider, the capacitance is variable increases Stays the same Decreases 21 / 31 Category: Electronics basics 21. 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 22 / 31 Category: Electronics basics 22. Current is considered as the movement of protons nuclei charge electrons 23 / 31 Category: Electronics basics 23. Which of the following is true about Zener diode? It is used in forward bias It is mostly used in voltage regulator electronic circuits It is lightly doped It is used in forward bias 24 / 31 Category: Electronics basics 24. An example of potential energy is a battery tea-kettle steam a moving vehicle the sun 25 / 31 Category: Electronics basics 25. To display the digit 8 in a seven-segment indicator, All segments must be on G must be off F must be on C must be lighted 26 / 31 Category: Electronics basics 26. One coulomb passing a point in one second is one charge ohm volt ampere Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits 27 / 31 Category: Electronics basics 27. Which type of semiconductor is used in Tunnel Diode? Degenerated semiconductor Extrinsic semiconductor Elemental semiconductor Compound semiconducto 28 / 31 Category: Electronics basics 28. Which resistive component is designed to be temperature sensitive? Thermistor Potentiometer Photoconductive cell Rheostat 29 / 31 Category: Electronics basics 29. Forbidden Energy gap (EG) of a semiconductor in electronic devices depends on which of the following factors? Material constant Recombination and Generation Interatomic distance Electron affinity 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. 30 / 31 Category: Electronics basics 30. What type of semiconductor is used in LED electronic circuits? Degenerated semiconductor Compensated semiconductor Intrinsic semiconductor Compound semiconductor 31 / 31 Category: Semiconductor diode (PN junction) 31. Which type of diode is work as a Variable Capacitor? Photo diode Tunnel Diode Varactor Diode LED Your score is LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
