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Standard XII
Physics
Transistor as an Amplifier
The transfer ...
Question
The transfer ratio of a transistor is 50. The input resistance of the transistor when used in the common-emitter configuration is 1 kΩ. The peak value of the collector AC current for an AC input voltage of 0.01
V
peak is (in
μ
m
)
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Solution
β=50,
R
i
=
1000
Ω
,
V
i
=
0.01
V
β
=
i
c
R
b
,
i
b
=
V
i
/
R
i
=
0.01
/
10
−
3
=
10
−
5
A
i
c
=
50
×
10
−
5
A
=
500
μ
A
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