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Question

Question: In a transistor, a change of 8.0 mA in the emitter current produces a change of 7.8 mA in the collec...

In a transistor, a change of 8.0 mA in the emitter current produces a change of 7.8 mA in the collector current. What change in the base current is necessary to produce the same change in the collector current.

A

50 μA

B

100 μA

C

150 μA

D

200 μA

Answer

200 μA

Explanation

Solution

Δie=Δic+Δib\Delta i_{e} = \Delta i_{c} + \Delta i_{b}

⇒ 8 = 7.8 +ΔibΔib\Delta i_{b} \Rightarrow \Delta i_{b}=0.2mA = 200 μA.