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. Current is considered as the movement of electrons charge protons nuclei 2 / 31 Category: Electronics basics 2. One coulomb passing a point in one second is one ohm charge volt ampere 3 / 31 Category: Electronics basics 3. An example of potential energy is a battery tea-kettle steam the sun a moving vehicle 4 / 31 Category: Electronics basics 4. A blown-fuse indicator uses a Constant-current diode Back diode Light-emitting diode Zener diode 5 / 31 Category: Electronics basics 5. Which of the following is true about Zener diode? It is used in forward bias It is mostly used in voltage regulator electronic circuits It is used in forward bias It is lightly doped 6 / 31 Category: Electronics basics 6. 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 7 / 31 Category: Electronics basics 7. Which voltage source converts chemical energy to electrical energy? Electronic power supply Solar cell Battery Electrical generator 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. 8 / 31 Category: Electronics basics 8. 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 9 / 31 Category: Electronics basics 9. For typical operation, you need to use reverse bias with a Zener diode Varactor All of the above Photodiode 10 / 31 Category: Electronics basics 10. The term used to designate electrical pressure is conductance voltage resistance voltage 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. 11 / 31 Category: Electronics basics 11. What type of semiconductor is used in LED electronic circuits? Intrinsic semiconductor Degenerated semiconductor Compound semiconductor Compensated semiconductor 12 / 31 Category: Electronics basics 12. Which of the following is not an electronic device? A mobile A magnifying glass A computer A keyboard 13 / 31 Category: Electronics basics 13. When the light increases, the reverse minority carrier current in a photodiode Is unaffected Increases Reverses direction Decreases 14 / 31 Category: Electronics basics 14. What is the color code for a 220 5% resistor? Red, Red, Brown, Gold Red, Red, Brown, Silver Red, Red, Black, Gold Orange, Orange, Black, Gold 15 / 31 Category: Electronics basics 15. The varactor is usually Reverse-biased Operated in the breakdown region Unbiased Forward-biased 16 / 31 Category: Electronics basics 16. A voltmeter is used: to measure coulombs in parallel with the circuit to measure current in series with the circuit 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. 17 / 31 Category: Electronics basics 17. Which of the following is wrong about solar cell electronic devices? Solar cell responsivity is directly proportional to the wavelength of light It produces dark current No external voltage is applied It is a photovoltaic cell 18 / 31 Category: Semiconductor diode (PN junction) 18. Which type of diode is work as a Variable Capacitor? Varactor Diode LED Photo diode Tunnel Diode 19 / 31 Category: Electronics basics 19. In which of the following region does BJT act as the amplifier electronic device? Cut-off Active Saturation Reverse saturation 20 / 31 Category: Electronics basics 20. Which of the following is the correct order of turn-off times? SCR < BJT < IGBT < MOSFET BJT < MOSFET < IGBT < SCR MOSFET < BJT < 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. 21 / 31 Category: Electronics basics 21. To display the digit 8 in a seven-segment indicator, G must be off C must be lighted All segments must be on F must be on 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. 22 / 31 Category: Electronics basics 22. Mass action law is not valid for which type of semiconductors in electronic devices? Elemental Compound Compensated Degenerative 23 / 31 Category: Electronics basics 23. f the depletion layer gets wider, the capacitance increases Decreases Stays the same is variable 24 / 31 Category: Electronics basics 24. Which of the following is not a physical component of an electronic circuit? Inductor Capacitor Temperature Diode 25 / 31 Category: Electronics basics 25. Which of the following semiconductor is mostly used to construct electronic circuits? Germanium Silicon Tin Selenium 26 / 31 Category: Electronics basics 26. A photodiode is normally Forward-biased Emitting light Neither forward- nor reverse biased Reverse-biased 27 / 31 Category: Electronics basics 27. Which of the following has a negative-resistance region? Schottky diode Step-recovery diode Tunnel diode Optocoupler P-N junction diodes have two modes of operations i.e. forward and reverse bias. 28 / 31 Category: Electronics basics 28. 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 can act as ON-OFF switches They have dynamic resistance at low-frequency AC voltage Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits 29 / 31 Category: Electronics basics 29. Which type of semiconductor is used in Tunnel Diode? Compound semiconducto Elemental semiconductor Degenerated semiconductor Extrinsic semiconductor 30 / 31 Category: Electronics basics 30. Which resistive component is designed to be temperature sensitive? Photoconductive cell Thermistor Potentiometer Rheostat 31 / 31 Category: Electronics basics 31. For a low voltage rectification: Bridge rectifier is suitable None Both bridge and full-wave rectifier are suitable Two diode full-wave rectifier is suitable Your score is LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
