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