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Physics Question on Semiconductor electronics: materials, devices and simple circuits

In a common base configuration; (transistor circuit) IE=1mA,IC=0.95mAI_E=1 mA,I_C =0.95 mA. The value of base current is

A

1.95 mA

B

0.05 mA

C

1.05 mA

D

0.95 mA

Answer

0.05 mA

Explanation

Solution

For a common base transistor IE=IB+IC I_E=I_B+I_C 1mA=IB+0.95 mA 1 mA=I_B+0.95\, mA IB=0.05 mA I_B =0.05\, mA