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In a common-base circuit calculate the change in the base current if that in the emitter current is αmA and a = 0.98 -

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Question

In a common-base circuit calculate the change in the base current if that in the emitter current is αmA and a = 0.98

Options

  • 0.04 mA

  • 1.96 mA

  • 2 mA

  • 98 mA

MCQ

Solution

0.04 mA

Explanation:

`alpha = I_c/I_e = (I_e - I_b)/I_e`

`I_b = I_e - alphaI_e = 2 - 0.90 xx 2` = 0.04 mA. 

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