Exercise: Electronic Devices And Circuits

Questions for: Electronic Devices And Circuits

Which is correct for a vacuum triode?
A:
μ = rpgm
B:
rp = μgm
C:
gm = μrp
D:
rpgm
Answer: B
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Covalent bond energy in Germanium is approximately
A:
3.8 eV
B:
4.7 eV
C:
7.4 eV
D:
12.5 eV
Answer: C
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Assertion (A): In intrinsic semiconductors, the charge concentration increases with temperature.

Reason (R): At higher temperatures, the forbidden energy gap in semiconductors is lower.

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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The modulation of effective base width by collector voltage is known as Early effect, hence reverse collector voltage
A:
increases both a and β
B:
decrease both a and β
C:
increase a but decrease β
D:
decrease a but increase β
Answer: C
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What is the function of silicon dioxide layer in MOSFETS?
A:
To provide high input resistance
B:
To increase current carriers
C:
To provide high output resistance
D:
Both (a) and (c)
Answer: A
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