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In a common emitter transistor, $β = 100$ and transconductance $(g_{m} = \frac{∆ I_{C}}{∆ V_{B E}})$ is $0.2 {(ohm)}^{- 1}$ . Then its input resistance is

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detailed solution

Correct option is D

gm=ΔICΔVBE=ΔICΔIB.ΔIBΔVBE=β1Ri∴ Ri=βgm=1000.2=500 Ω

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In a common emitter transistor, β=100 and transconductance gm=∆IC∆VBEis 0.2(ohm)−1. Then its input resistance is

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In a common emitter transistor, $β = 100$ and transconductance $(g_{m} = \frac{∆ I_{C}}{∆ V_{B E}})$ is $0.2 {(ohm)}^{- 1}$ . Then its input resistance is