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