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In a common base configuration the emitter current changes by `5mA` when emitter voltage is changed by `200 mV` at a fixed collector to base voltage.

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In a common base configuration the emitter current changes by `5mA` when emitter voltage is changed by `200 mV` at a fixed collector to base voltage. The input resistance is.
A. `40 Omega`
B. `1000 Omega`
C. `2.5 Omega`
D. `4 Omega`
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1 Answer

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Correct Answer - A
`V_(BE)=I_(e) R_(i)`.
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