Transistor questions and answers Leave a Comment / Electronics Multiple choice question MCQ Share this /32 6 Created on September 11, 2022 Transistor Basic theoretical knowledge of transistor 1 / 32 1. In a transistor if β = 100 and collector current is 10 mA, then IE is ………… 100.1 mA 100 mA none of the above 110 mA 2 / 32 2. The collector-base junction in a transistor has ……………. forward bias at all times low resistance none of the above reverse bias at all times 3 / 32 3. A transistor has....... Four PN junctions Three PN junctions One PN junction Two PN junctions 4 / 32 4. The voltage gain in a transistor connected in ………………. arrangement is the highest common emitter none of the above common collector common base 5 / 32 5. In a transistor, signal is transferred from a …………… circuit low resistance to high resistance high resistance to low resistance low resistance to low resistance high resistance to high resistance 6 / 32 6. In a transistor, the base current is about ………….. of emitter current 25% 5% 20% 35 % 7 / 32 7. The arrow in the symbol of a transistor indicates the direction of …………. donor ion current electron current in the emitter hole current in the emitter electron current in the collector 8 / 32 8. The power gain in a transistor connected in ……………. arrangement is the highest common base common collector none of the above common emitter 9 / 32 9. When the transistor is used in Cut-off or Saturation state, It acts as ? As AND gate An amplifire A switch An zener diode 10 / 32 10. The emitter of a transistor is ………………… doped heavily moderately lightly none of the above 11 / 32 11. BC 147 transistor indicates that it is made of ………….. carbon germanium none of the above silicon 12 / 32 12. A current ratio of IC/IE is usually less than one and is called ………… theta alpha omega beta 13 / 32 13. In a transistor ……………….. IB = IC + IE IC = IE + IB IE = IC + IB IE = IC – IB 14 / 32 14. In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of β is ………… 50 about 1 100 200 15 / 32 15. The C-B configuration is used to provide which type of gain? resistance current power voltage 16 / 32 16. ICEO = (………) ICBO 1 + α β none of the above 1 + β 17 / 32 17. The value of β for a transistor is generally ……………….. above 500 between 20 and 500 less than 1 1 18 / 32 18. A transistor is a …………… operated device voltage current both 19 / 32 19. In a npn transistor, ……………. are the minority carriers donor ions holes acceptor ions free electrons 20 / 32 20. The most commonly used transistor arrangement is …………… arrangement none of the above common collector common emitter common base 21 / 32 21. The relation between β and α is ………….. β = α / (1 + α ) β = α / (1 – α ) β = (1 – α ) / α β = 1 / (1 – α ) 22 / 32 22. In a transistor, collector current is controlled by ……….. all of the above collector voltage collector resistance base current 23 / 32 23. The collector of a transistor is …………. doped heavily none of the above lightly moderately 24 / 32 24. The number of depletion layers in a transistor is ...... Two One Three Four 25 / 32 25. With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be …… open high resistance infinite low resistance 26 / 32 26. The value of α of a transistor is ………. more than 1 less than 1 1 none of the above 27 / 32 27. Beta’s current ratio is …….. IC/IB IE/IB IC/IE IB/IE 28 / 32 28. Total emitter current is ………… IB – IC IC + IE IE – IC IB + IC 29 / 32 29. The output impedance of a transistor is …………….. very low high zero low 30 / 32 30. The input impedance of a transistor is …………. very high low almost zero high 31 / 32 31. A transistor is a …………… operated device none of the above both voltage current 32 / 32 32. In a pnp transistor, the current carriers are …………. donor ions free electrons holes acceptor ions Your score is The average score is 36% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Exit Send feedback Share this