Transistors

11. When the temperature changes, the operating point is shifted due to .

Change in ICBO
Change in VCC
Change in the values of circuit resistance
None of the above

Detailed SolutionWhen the temperature changes, the operating point is shifted due to .

12. A transistor is a ___________ operated device

current
voltage
both voltage and current
none of the above

Detailed SolutionA transistor is a ___________ operated device

13. A heat sink is generally used with a transistor to ___________

increase the forward current
decrease the forward current
compensate for excessive doping
prevent excessive temperature rise

Detailed SolutionA heat sink is generally used with a transistor to ___________

14. BC 147 transistor indicates that it is made of ___________

germanium
silicon
carbon
none of the above

Detailed SolutionBC 147 transistor indicates that it is made of ___________

15. The value of VBE ___________

Depends upon IC to moderate extent
Is almost independent of IC
Is strongly dependant on IC
None of the above

Detailed SolutionThe value of VBE ___________

16. The leakage current in a silicon transistor is about ___________ the leakage current in a germanium transistor

One hundredth
One tenth
One thousandth
One millionth

Detailed SolutionThe leakage current in a silicon transistor is about ___________ the leakage current in a germanium transistor

17. At parallel resonance, the line current is ___________

Minimum
Maximum
Quite large
None of the above

Detailed SolutionAt parallel resonance, the line current is ___________

18. Tuned class C amplifiers are used for RF signals of ___________

Low power
High power
Very high power
None of the above

Detailed SolutionTuned class C amplifiers are used for RF signals of ___________

19. The current IB is ___________

electron current
hole current
donor ion current
acceptor ion current

Detailed SolutionThe current IB is ___________

20. The operating point ___________ on the a.c. load line

Also line
Does not lie
May or may not lie
Data insufficient

Detailed SolutionThe operating point ___________ on the a.c. load line

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