Basic electronics MCQ question answer Leave a Comment / Electronics Multiple choice question MCQ Share this 0% 33 Created on September 19, 2022Basic electronics Basic electronics 2 1 / 31 Category: Electronics basics 1. In which of the following region does BJT act as the amplifier electronic device? Cut-off Saturation Reverse saturation Active 2 / 31 Category: Electronics basics 2. What is the color code for a 220  5% resistor? Red, Red, Black, Gold Red, Red, Brown, Silver Red, Red, Brown, Gold Orange, Orange, Black, Gold 3 / 31 Category: Electronics basics 3. Which resistive component is designed to be temperature sensitive? Thermistor Rheostat Photoconductive cell Potentiometer Hint 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. 4 / 31 Category: Electronics basics 4. What type of semiconductor is used in LED electronic circuits? Compensated semiconductor Compound semiconductor Degenerated semiconductor Intrinsic semiconductor Hint 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. 5 / 31 Category: Electronics basics 5. Mass action law is not valid for which type of semiconductors in electronic devices? Elemental Degenerative Compensated Compound 6 / 31 Category: Electronics basics 6. A photodiode is normally Neither forward- nor reverse biased Reverse-biased Emitting light Forward-biased 7 / 31 Category: Electronics basics 7. To display the digit 8 in a seven-segment indicator, G must be off All segments must be on C must be lighted F must be on Hint 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. 8 / 31 Category: Electronics basics 8. 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 It is a photovoltaic cell connected in reverse bias 9 / 31 Category: Electronics basics 9. For a low voltage rectification: Bridge rectifier is suitable None Two diode full-wave rectifier is suitable Both bridge and full-wave rectifier are suitable 10 / 31 Category: Electronics basics 10. Which of the following has a negative-resistance region? Tunnel diode Step-recovery diode Optocoupler Schottky diode 11 / 31 Category: Electronics basics 11. An example of potential energy is a moving vehicle tea-kettle steam a battery the sun Hint P-N junction diodes have two modes of operations i.e. forward and reverse bias. 12 / 31 Category: Electronics basics 12. 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 three modes of operations They have diffusion capacitance at high-frequency AC voltage 13 / 31 Category: Electronics basics 13. One coulomb passing a point in one second is one ampere charge volt ohm 14 / 31 Category: Electronics basics 14. When the light increases, the reverse minority carrier current in a photodiode Increases Is unaffected Reverses direction Decreases 15 / 31 Category: Electronics basics 15. A voltmeter is used: in parallel with the circuit to measure current to measure coulombs in series with the circuit 16 / 31 Category: Semiconductor diode (PN junction) 16. Which type of diode is work as a Variable Capacitor? Tunnel Diode Varactor Diode Photo diode LED 17 / 31 Category: Electronics basics 17. The term used to designate electrical pressure is conductance voltage resistance voltage 18 / 31 Category: Electronics basics 18. Which of the following is not an electronic device? A mobile A keyboard A magnifying glass A computer 19 / 31 Category: Electronics basics 19. Which voltage source converts chemical energy to electrical energy? Electronic power supply Solar cell Battery Electrical generator 20 / 31 Category: Electronics basics 20. Which of the following semiconductor is mostly used to construct electronic circuits? Selenium Tin Silicon Germanium 21 / 31 Category: Electronics basics 21. f the depletion layer gets wider, the capacitance is variable Decreases Stays the same increases 22 / 31 Category: Electronics basics 22. Which of the following is not a physical component of an electronic circuit? Inductor Capacitor Temperature Diode 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 used in forward bias It is lightly doped 24 / 31 Category: Electronics basics 24. Which of the following is the correct order of turn-off times? MOSFET < IGBT < BJT < SCR MOSFET < BJT < IGBT < SCR SCR < BJT < IGBT < MOSFET 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. 25 / 31 Category: Electronics basics 25. Forbidden Energy gap (EG) of a semiconductor in electronic devices depends on which of the following factors? Material constant Electron affinity Recombination and Generation Interatomic distance 26 / 31 Category: Electronics basics 26. For typical operation, you need to use reverse bias with a Photodiode Varactor All of the above Zener diode Hint 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 Elemental semiconductor Extrinsic semiconductor Degenerated semiconductor 28 / 31 Category: Electronics basics 28. A blown-fuse indicator uses a Back diode Constant-current diode Light-emitting diode Zener diode 29 / 31 Category: Electronics basics 29. Current is considered as the movement of nuclei electrons protons charge Hint 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. 30 / 31 Category: Electronics basics 30. 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 It is a photovoltaic cell No external voltage is applied 31 / 31 Category: Electronics basics 31. The varactor is usually Operated in the breakdown region Forward-biased Unbiased Reverse-biased Your score is The average score is 31% LinkedIn Facebook Twitter 0% Restart quiz Exit Send feedback Share this