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: Semiconductor diode (PN junction) 1. Which type of diode is work as a Variable Capacitor? Varactor Diode Tunnel Diode Photo diode LED 2 / 31 Category: Electronics basics 2. Which of the following is not a physical component of an electronic circuit? Capacitor Inductor Diode Temperature 3 / 31 Category: Electronics basics 3. For a low voltage rectification: Bridge rectifier is suitable Two diode full-wave rectifier is suitable None Both bridge and full-wave rectifier are suitable 4 / 31 Category: Electronics basics 4. An example of potential energy is tea-kettle steam the sun a moving vehicle a battery 5 / 31 Category: Electronics basics 5. The term used to designate electrical pressure is voltage conductance voltage resistance 6 / 31 Category: Electronics basics 6. The varactor is usually Forward-biased Operated in the breakdown region Unbiased Reverse-biased 7 / 31 Category: Electronics basics 7. A voltmeter is used: in series with the circuit to measure coulombs in parallel with the circuit to measure current 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. 8 / 31 Category: Electronics basics 8. What type of semiconductor is used in LED electronic circuits? Intrinsic semiconductor Compensated semiconductor Compound semiconductor Degenerated semiconductor 9 / 31 Category: Electronics basics 9. A blown-fuse indicator uses a Back diode Constant-current diode Light-emitting diode Zener diode 10 / 31 Category: Electronics basics 10. In which of the following region does BJT act as the amplifier electronic device? Reverse saturation Saturation Cut-off Active 11 / 31 Category: Electronics basics 11. One coulomb passing a point in one second is one charge ohm volt ampere 12 / 31 Category: Electronics basics 12. Which of the following is true about Zener diode? It is lightly doped It is used in forward bias It is used in forward bias It is mostly used in voltage regulator electronic circuits 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. 13 / 31 Category: Electronics basics 13. Which of the following is wrong about solar cell electronic devices? It is a photovoltaic cell It produces dark current Solar cell responsivity is directly proportional to the wavelength of light No external voltage is applied 14 / 31 Category: Electronics basics 14. Which resistive component is designed to be temperature sensitive? Potentiometer Thermistor Photoconductive cell Rheostat 15 / 31 Category: Electronics basics 15. Which voltage source converts chemical energy to electrical energy? Solar cell Electronic power supply Electrical generator Battery 16 / 31 Category: Electronics basics 16. Current is considered as the movement of electrons nuclei protons charge 17 / 31 Category: Electronics basics 17. For typical operation, you need to use reverse bias with a Photodiode Varactor All of the above Zener diode 18 / 31 Category: Electronics basics 18. 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 19 / 31 Category: Electronics basics 19. Which of the following is the correct order of turn-off times? SCR < BJT < IGBT < MOSFET MOSFET < BJT < IGBT < SCR BJT < MOSFET < IGBT < SCR 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. Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits 20 / 31 Category: Electronics basics 20. Which type of semiconductor is used in Tunnel Diode? Degenerated semiconductor Extrinsic semiconductor Compound semiconducto Elemental semiconductor 21 / 31 Category: Electronics basics 21. Which of the following is not an electronic device? A keyboard A computer A mobile A magnifying glass 22 / 31 Category: Electronics basics 22. Which of the following semiconductor is mostly used to construct electronic circuits? Germanium Tin Silicon Selenium 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. 23 / 31 Category: Electronics basics 23. Which of the following is correct about photodiode electronic devices? Electron-hole pairs are generated by impurity injection in depletion layer It is a photovoltaic cell connected in reverse bias No external voltage is applied 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. 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 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. 26 / 31 Category: Electronics basics 26. Mass action law is not valid for which type of semiconductors in electronic devices? Degenerative Elemental Compensated Compound 27 / 31 Category: Electronics basics 27. Which of the following has a negative-resistance region? Tunnel diode Step-recovery diode Schottky diode Optocoupler 28 / 31 Category: Electronics basics 28. f the depletion layer gets wider, the capacitance is variable increases Stays the same Decreases 29 / 31 Category: Electronics basics 29. To display the digit 8 in a seven-segment indicator, All segments must be on C must be lighted G must be off F must be on P-N junction diodes have two modes of operations i.e. forward and reverse bias. 30 / 31 Category: Electronics basics 30. 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 can act as ON-OFF switches They have dynamic resistance at low-frequency AC voltage They have three modes of operations 31 / 31 Category: Electronics basics 31. A photodiode is normally Emitting light Reverse-biased Neither forward- nor reverse biased Forward-biased Your score is LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
