transistors MCQs – Page 2

Practise focused transistors questions with marked answers for exam preparation and subject revision.

transistors Mcqs

21. The phase difference between the input and output voltages in a common base arrangement is___________?
0

A. 90o

B. 180o

C. 0o

D. 270o

22. The output impedance of a transistor connected in_____________arrangement is the highest?
0

A. common collector

B. common base

C. common emitter

D. none of the above

23. The value of a of a transistor is_____________?
0

A. 1

B. less than 1

C. more than 1

D. none of the above

24. If the value of a is 0.9, then value of is___________?
0

A. 9

B. 900

C. 0.9

D. 90

25. The input impedance of a transistor is___________?
0

A. low

B. very high

C. almost zero

D. high

26. In a transistor, the base current is about_________of emitter current?
0

A. 25%

B. 35%

C. 5%

D. 20%

27. IC = [a / (1 a )] IB + [___________ / (1 a )?
0

A. IE

B. ICBO

C. ICEO

D. IC

28. In a transistor if = 100 and collector current is 10 mA, then IE is___________?
0

A. 100 mA

B. 110 mA

C. none of the above

D. 100.1 mA

29. The arrow in the symbol of a transistor indicates the direction of____________?
0

A. hole current in the emitter

B. electron current in the collector

C. electron current in the emitter

D. donor ion current

30. In a transistor ______________?
0

A. IE = IC + IB

B. IB = IC + IE

C. IC = IE + IB

D. IE = IC IB

31. IC = aIE +____________?
0

A. IB

B. ICBO

C. ICEO

D. IB

32. The most commonly used transistor arrangement is____________arrangement?
0

A. none of the above

B. common emitter

C. common collector

D. common base

33. The relation between and a is______________?
0

A. = (1 a ) / a

B. = a / (1 a )

C. = a / (1 + a )

D. = 1 / (1 a )

34. Most of the majority carriers from the emitter____________?
0

A. recombine in the base

B. none of the above

C. recombine in the emitter

D. pass through the base region to the collector

35. The base of a transistor is____________doped?
0

A. heavily

B. moderately

C. lightly

D. none of the above

36. A transistor has____________?
0

A. two pn junctions

B. four pn junctions

C. one pn junction

D. three pn junctions

37. A transistor is a___________operated device?
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A. current

B. voltage

C. both voltage and current

D. none of the above

38. BC 147 transistor indicates that it is made of____________?
0

A. carbon

B. silicon

C. none of the above

D. germanium

39. The value of for a transistor is generally____________?
0

A. 1

B. above 500

C. between 20 and 500

D. less than 1

40. IC = IB +__________?
0

A. ICBO

B. ICEO

C. IC

D. aIE

Showing 21 to 40 of 42 mcqs