Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

In standard TTL, the 'totem pole' stage refers to
A:
the multi-emitter I/P stage
B:
phase splitter
C:
the O/P buffer
D:
open collector O/P stage
Answer: C
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In a transistor operating in forward active mode
A:
depletion layer between emitter and base is thin and that between base and collector is also thin
B:
both depletion regions are thick
C:
depletion layer between emitter and base is thin and that between base and collector is thick
D:
depletion layer between emitter and base is thick and that between base and collector is thin
Answer: C
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Which of the following element has four valence electrons?
A:
Silicon
B:
Germanium
C:
Both (a) and (b) above
D:
None of the above
Answer: C
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Typical value of reverse current in a semiconductor diode is
A:
1 A
B:
0.1 A
C:
1 ΞA
D:
0.1 ΞA
Answer: D
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Assertion (A): The resistivity of intrinsic semiconductor decreases with increase in temperature.

Reason (R): The forbidden gap decreases with increase in temperature.

A:
Both A and R are true and R is correct explanation of A
B:
Both A and R are true but R is not a correct explanation of A
C:
A is true but R is false
D:
A is false but R is true
Answer: A
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