Basic Electronics MCQs 

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1. The basic unit of electric charge is:



2. The charge on one electron is approximately:



3. The material having least resistance is:



4. The device which converts AC into DC is called:



5. In a semiconductor, the charge carriers are:



6. The most commonly used semiconductor material is:



7. A diode conducts current in:



8. The reverse breakdown in a diode occurs due to:



9. The unit of resistance is:



10. The unit of capacitance is:



11. The function of a capacitor in an electronic circuit is to:



12. The color code of a 1 kΩ resistor (±5%) is:



13. The transistor is used mainly for:



14. The transistor has how many terminals?



15. In a PNP transistor, the majority carriers are:



16. The base of a transistor is:



17. The device which converts DC into AC is called:



18. The output of a full-wave rectifier is:



19. A zener diode is used for:



20. The transistor works in which region as an amplifier?



21. The input impedance of a common-base transistor is:



22. The output of a NOT gate is:



23. The binary number 1010 equals to decimal:



24. The logic gate which gives output 1 when all inputs are 1 is:



25. The Boolean expression for an OR gate is:



26. The most common logic family used today is:



27. The term LED stands for:



28. A photodiode works on the principle of:



29. The input to an operational amplifier is:



30. The gain of an ideal op-amp is:



31. The frequency of DC signal is:



32. The function of a filter circuit is to:



33. The device used to generate a repetitive waveform is:



34. The component which stores energy in a magnetic field is:



35. The transformer operates on the principle of:



36. The turn ratio of a step-up transformer is:
38. In an NPN transistor, current flows from:



39. The main function of a voltage divider bias circuit is to:



40. The device used for measuring current is:



41. The device used to measure voltage is:



42. The SI unit of power is:



43. The transistor works as a switch in which regions?



44. The avalanche breakdown occurs in:



45. The N-type semiconductor is obtained by adding:



46. The P-type semiconductor has:



47. The junction of P-type and N-type semiconductor forms a:



48. The frequency range of audio signals is:



49. The component used for tuning in radios is:



50. The transistor amplifier output is taken from:



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