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Question
A pnp transistor is used in common-emitter mode. If a change of 40 µA in base current brings a change of 2 µA in collector current with 0.04 V in base-emitter voltage, then the input resistance is ____________.
Options
`1 Omega`
`10 Omega`
`100 Omega`
`1000 Omega`
MCQ
Fill in the Blanks
Solution
A pnp transistor is used in common-emitter mode. If a change of 40 µA in base current brings a change of 2 µA in collector current with 0.04 V in base-emitter voltage, then the input resistance is `1000 Omega`.
Explanation:
`"r"_"i" = (Delta"V"_"BE")/(Delta"I"_"B")`
` = 0.04/40 xx 10^-6`
` = 1000 Omega`
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