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