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