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Question

Question: In a common emitter transistor, the current gain is 80. What is the change in collector current, whe...

In a common emitter transistor, the current gain is 80. What is the change in collector current, when the change in base current is 250 μA

A

80 × 250 μA

B

(250 – 80) μA

C

(250 + 80) μA

D

250/80 μA

Answer

80 × 250 μA

Explanation

Solution

Current gain

β=ΔicΔibΔic=β×Δib\beta = \frac{\Delta i_{c}}{\Delta i_{b}} \Rightarrow \Delta i_{c} = \beta \times \Delta i_{b}= 80 × 250 μA.