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