MCQOPTIONS
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MCQOPTIONS
This section includes 42 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The voltage gain of a transistor connected in common collector arrangement is____________? |
| A. | equal to 1 |
| B. | more than 10 |
| C. | more than 100 |
| D. | less than 1 |
| Answer» E. | |
| 2. |
The voltage gain in a transistor connected in___________arrangement is the highest? |
| A. | common base |
| B. | common collector |
| C. | common emitter |
| D. | none of the above |
| Answer» D. none of the above | |
| 3. |
The value of a of a transistor is_____________? |
| A. | more than 1 |
| B. | less than 1 |
| C. | 1 |
| D. | none of the above |
| Answer» C. 1 | |
| 4. |
The value of ß for a transistor is generally____________? |
| A. | 1 |
| B. | less than 1 |
| C. | between 20 and 500 |
| D. | above 500 |
| Answer» D. above 500 | |
| 5. |
The relation between ß and a is______________? |
| A. | ß = 1 / (1 – a ) |
| B. | ß = (1 – a ) / a |
| C. | ß = a / (1 – a ) |
| D. | ß = a / (1 + a ) |
| Answer» D. ß = a / (1 + a ) | |
| 6. |
The power gain in a transistor connected in___________arrangement is the highest? |
| A. | common emitter |
| B. | common base |
| C. | common collector |
| D. | none of the above |
| Answer» B. common base | |
| 7. |
The phase difference between the input and output voltages of a transistor connected in common emitter arrangement is___________? |
| A. | 0o |
| B. | 180o |
| C. | 90o |
| D. | 270o |
| Answer» C. 90o | |
| 8. |
The phase difference between the input and output voltages of a transistor connected in common collector arrangement is_____________? |
| A. | 180° |
| B. | 0° |
| C. | 90° |
| D. | 270° |
| Answer» C. 90° | |
| 9. |
The phase difference between the input and output voltages in a common base arrangement is___________? |
| A. | 180o |
| B. | 90o |
| C. | 270o |
| D. | 0o |
| Answer» E. | |
| 10. |
The output impedance of a transistor connected in_____________arrangement is the highest? |
| A. | common emitter |
| B. | common collector |
| C. | common base |
| D. | none of the above |
| Answer» D. none of the above | |
| 11. |
The output impedance of a transistor is____________? |
| A. | high |
| B. | zero |
| C. | low |
| D. | very low |
| Answer» B. zero | |
| 12. |
The most commonly used transistor arrangement is____________arrangement? |
| A. | common emitter |
| B. | common base |
| C. | common collector |
| D. | none of the above |
| Answer» B. common base | |
| 13. |
The most commonly used semiconductor in the manufacture of a transistor is_____________? |
| A. | germanium |
| B. | silicon |
| C. | carbon |
| D. | none of the above |
| Answer» C. carbon | |
| 14. |
The leakage current in CE arrangement is____________that in CB arrangement? |
| A. | more than |
| B. | less than |
| C. | the same as |
| D. | none of the above |
| Answer» B. less than | |
| 15. |
The input impedance of a transistor is___________? |
| A. | high |
| B. | low |
| C. | very high |
| D. | almost zero |
| Answer» C. very high | |
| 16. |
The input impedance of a transistor connected in___________arrangement is the highest? |
| A. | common emitter |
| B. | common collector |
| C. | common base |
| D. | none of the above |
| Answer» C. common base | |
| 17. |
The emitter of a transistor is___________doped? |
| A. | lightly |
| B. | heavily |
| C. | moderately |
| D. | none of the above |
| Answer» C. moderately | |
| 18. |
The element that has the biggest size in a transistor is____________? |
| A. | collector |
| B. | base |
| C. | emitter |
| D. | collector-base-junction |
| Answer» B. base | |
| 19. |
The collector-base junction in a transistor has___________? |
| A. | forward bias at all times |
| B. | reverse bias at all times |
| C. | low resistance |
| D. | none of the above |
| Answer» C. low resistance | |
| 20. |
The collector of a transistor is____________doped? |
| A. | heavily |
| B. | moderately |
| C. | lightly |
| D. | none of the above |
| Answer» C. lightly | |
| 21. |
The base of a transistor is____________doped? |
| A. | heavily |
| B. | moderately |
| C. | lightly |
| D. | none of the above |
| Answer» D. none of the above | |
| 22. |
The arrow in the symbol of a transistor indicates the direction of____________? |
| A. | electron current in the emitter |
| B. | electron current in the collector |
| C. | hole current in the emitter |
| D. | donor ion current |
| Answer» D. donor ion current | |
| 23. |
Most of the majority carriers from the emitter____________? |
| A. | recombine in the base |
| B. | recombine in the emitter |
| C. | pass through the base region to the collector |
| D. | none of the above |
| Answer» D. none of the above | |
| 24. |
In a transistor ______________? |
| A. | IC = IE + IB |
| B. | IB = IC + IE |
| C. | IE = IC – IB |
| D. | IE = IC + IB |
| Answer» E. | |
| 25. |
In a transistor, the base current is about_________of emitter current? |
| A. | 25% |
| B. | 20% |
| C. | 35 % |
| D. | 5% |
| Answer» E. | |
| 26. |
In a transistor, signal is transferred from a___________circuit? |
| A. | high resistance to low resistance |
| B. | low resistance to high resistance |
| C. | high resistance to high resistance |
| D. | low resistance to low resistance |
| Answer» C. high resistance to high resistance | |
| 27. |
In a transistor if ß = 100 and collector current is 10 mA, then IE is___________? |
| A. | 100 mA |
| B. | 100.1 mA |
| C. | 110 mA |
| D. | none of the above |
| Answer» C. 110 mA | |
| 28. |
In a tansistor, IC = 100 mA and IE = 100.2 mA. The value of ß is____________? |
| A. | 100 |
| B. | 50 |
| C. | about 1 |
| D. | 200 |
| Answer» E. | |
| 29. |
In a pnp transistor, the current carriers are______________? |
| A. | acceptor ions |
| B. | donor ions |
| C. | free electrons |
| D. | holes |
| Answer» E. | |
| 30. |
In a npn transistor,_____________are the minority carriers? |
| A. | free electrons |
| B. | holes |
| C. | donor ions |
| D. | acceptor ions |
| Answer» C. donor ions | |
| 31. |
If the value of a is 0.9, then value of ß is___________? |
| A. | 9 |
| B. | 0.9 |
| C. | 900 |
| D. | 90 |
| Answer» E. | |
| 32. |
IC = aIE +____________? |
| A. | IB |
| B. | ICEO |
| C. | ICBO |
| D. | ßIB |
| Answer» D. ßIB | |
| 33. |
IC = [a / (1 – a )] IB + [___________ / (1 – a )? |
| A. | ICBO |
| B. | ICEO |
| C. | IC |
| D. | IE |
| Answer» B. ICEO | |
| 34. |
IC = [a / (1 – a )] IB +_____________? |
| A. | ICEO |
| B. | ICBO |
| C. | IC |
| D. | (1 – a ) IB |
| Answer» B. ICBO | |
| 35. |
IC = ß IB +__________? |
| A. | ICBO |
| B. | IC |
| C. | ICEO |
| D. | aIE |
| Answer» D. aIE | |
| 36. |
BC 147 transistor indicates that it is made of____________? |
| A. | germanium |
| B. | silicon |
| C. | carbon |
| D. | none of the above |
| Answer» C. carbon | |
| 37. |
At the base-emitter junctions of a transistor, one finds___________? |
| A. | a reverse bias |
| B. | a wide depletion layer |
| C. | low resistance |
| D. | none of the above |
| Answer» D. none of the above | |
| 38. |
As the temperature of a transistor goes up, the base-emitter resistance___________? |
| A. | decreases |
| B. | increases |
| C. | remains the same |
| D. | none of the above |
| Answer» B. increases | |
| 39. |
A transistor is connected in CB mode. If it is not connected in CE mode with same bias voltages, the values of IE, IB and IC will____________? |
| A. | remain the same |
| B. | increase |
| C. | decrease |
| D. | none of the above |
| Answer» B. increase | |
| 40. |
A transistor is a___________operated device? |
| A. | current |
| B. | voltage |
| C. | both voltage and current |
| D. | none of the above |
| Answer» B. voltage | |
| 41. |
A transistor has____________? |
| A. | one pn junction |
| B. | two pn junctions |
| C. | three pn junctions |
| D. | four pn junctions |
| Answer» C. three pn junctions | |
| 42. |
A heat sink is generally used with a transistor to______________? |
| A. | increase the forward current |
| B. | decrease the forward current |
| C. | compensate for excessive doping |
| D. | prevent excessive temperature rise |
| Answer» E. | |