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