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A p-n-p transistor is used as common bas...

A p-n-p transistor is used as common base amplifier as `V_(eb) =3V` . When its emitter current changes from 13.4 mA to 20.14 mA its collector current changes from 13.4 mA to 19.9 mA. Its current gain will be

A

9.849

B

0.8489

C

98.49

D

0.9849

Text Solution

Verified by Experts

The correct Answer is:
D
`V_(eb)=3V`,
`deltaI_(e)=20.15-13.55=6.6 mA`
`deltaI_(c)=19.9-13.4=6.5 mA`
`alpha=?`
Now `alpha=(deltaI_(c))/(deltaI_(e))`
`=(6.5)/(6.6)=0.9849`
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