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