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 Degenerative N-type and degenerative p-type semiconductors are used in tunnel diodes. Tunnel diodes are used in microwave electronic devices and circuits 1 / 31 Category: Electronics basics 1. Which type of semiconductor is used in Tunnel Diode? Elemental semiconductor Degenerated semiconductor Extrinsic semiconductor Compound semiconducto 2 / 31 Category: Electronics basics 2. One coulomb passing a point in one second is one ohm charge volt ampere 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. 3 / 31 Category: Electronics basics 3. 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 No external voltage is applied It is a photovoltaic cell 4 / 31 Category: Electronics basics 4. Which of the following is the correct order of turn-off times? SCR < BJT < IGBT < MOSFET MOSFET < BJT < IGBT < SCR MOSFET < IGBT < BJT < SCR BJT < MOSFET < 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. 5 / 31 Category: Electronics basics 5. The term used to designate electrical pressure is resistance voltage voltage conductance 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? Rheostat Photoconductive cell Potentiometer Thermistor 8 / 31 Category: Electronics basics 8. When the light increases, the reverse minority carrier current in a photodiode Is unaffected Increases Decreases Reverses direction 9 / 31 Category: Semiconductor diode (PN junction) 9. Which type of diode is work as a Variable Capacitor? LED Tunnel Diode Photo diode Varactor Diode 10 / 31 Category: Electronics basics 10. An example of potential energy is a moving vehicle tea-kettle steam the sun a battery 11 / 31 Category: Electronics basics 11. To display the digit 8 in a seven-segment indicator, G must be off All segments must be on F must be on C must be lighted P-N junction diodes have two modes of operations i.e. forward and reverse bias. 12 / 31 Category: Electronics basics 12. Which of the following is wrong about P-N junction diodes used in electronic devices? They can act as ON-OFF switches They have dynamic resistance at low-frequency AC voltage They have diffusion capacitance at high-frequency AC voltage They have three modes of operations 13 / 31 Category: Electronics basics 13. A voltmeter is used: to measure current to measure coulombs in series with the circuit in parallel with the circuit 14 / 31 Category: Electronics basics 14. Which of the following is not an electronic device? A keyboard A mobile A magnifying glass A computer 15 / 31 Category: Electronics basics 15. Current is considered as the movement of charge nuclei protons electrons 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. 16 / 31 Category: Electronics basics 16. Mass action law is not valid for which type of semiconductors in electronic devices? Degenerative Elemental Compensated Compound 17 / 31 Category: Electronics basics 17. A blown-fuse indicator uses a Zener diode Light-emitting diode Constant-current diode Back diode 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. 18 / 31 Category: Electronics basics 18. 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. 19 / 31 Category: Electronics basics 19. 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 20 / 31 Category: Electronics basics 20. For a low voltage rectification: Two diode full-wave rectifier is suitable Both bridge and full-wave rectifier are suitable None Bridge rectifier is suitable 21 / 31 Category: Electronics basics 21. f the depletion layer gets wider, the capacitance Stays the same Decreases increases is variable 22 / 31 Category: Electronics basics 22. Forbidden Energy gap (EG) of a semiconductor in electronic devices depends on which of the following factors? Recombination and Generation Interatomic distance Material constant Electron affinity 23 / 31 Category: Electronics basics 23. In which of the following region does BJT act as the amplifier electronic device? Saturation Cut-off Reverse saturation Active 24 / 31 Category: Electronics basics 24. Which voltage source converts chemical energy to electrical energy? Electrical generator Battery Electronic power supply Solar cell 25 / 31 Category: Electronics basics 25. A photodiode is normally Neither forward- nor reverse biased Reverse-biased Emitting light Forward-biased 26 / 31 Category: Electronics basics 26. For typical operation, you need to use reverse bias with a Zener diode All of the above Photodiode Varactor 27 / 31 Category: Electronics basics 27. Which of the following is not a physical component of an electronic circuit? Inductor Capacitor Temperature Diode 28 / 31 Category: Electronics basics 28. Which of the following has a negative-resistance region? Tunnel diode Optocoupler Schottky diode Step-recovery diode 29 / 31 Category: Electronics basics 29. What is the color code for a 220 5% resistor? Red, Red, Black, Gold Red, Red, Brown, Gold Orange, Orange, Black, Gold Red, Red, Brown, Silver 30 / 31 Category: Electronics basics 30. The varactor is usually Unbiased Reverse-biased Operated in the breakdown region Forward-biased 31 / 31 Category: Electronics basics 31. Which of the following semiconductor is mostly used to construct electronic circuits? Silicon Tin Selenium Germanium Your score is LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
