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The transfer characteristic curve of a t...

The transfer characteristic curve of a transistor, having input and output resistance `100Omega and 100kOmega` respectively, is shown in the figure. The Voltage and Power gain, are respectively:

A

`2.5xx10^(4), 2.5xx10^(6)`

B

`5xx10^(4), 2.5xx10^(6)`

C

`5xx10^(4), 5xx10^(5)`

D

`5xx10^(4), 5xx10^(6)`

Text Solution

Verified by Experts

The correct Answer is:
B
`R_(i)=100Omega," "R_("o")=100xx10^(3)Omega`
`"Voltage gain"=("Change in output voltage")/("Change in input voltage")`
`"Voltage gain"=(DeltaV_(0))//(DeltaV_(i))`
`=(DeltaI_(c)xxR_(0))/(DeltaI_(b)xxR_(i))," "A_(V)=5xx10^(4)`
`"Power gain "=("change in output power")/("change in input power")=(DeltaV_(0).DeltaI_(c))/(DeltaV_(i).DeltaI_(b))=(DeltaI_(c).R_(0).DeltaI_(c))/(DeltaI_(b).R_(i)xxDeltaI_())=((DeltaI_(c))/(DeltaIb))^(2)xx(R_(0))/(R_(i))`
`=(5xx10^(-3))/(100xx10^(-6))^(2)xx(100xx10^(3))/(100)=(25xx10^(-6))/(10^(-8))xx10^(3)`
`"Power gain " =25xx10^(5)=2.5xx10^(6)`
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