Physics, asked by zakirahmed2004, 8 months ago

In Bipolar Junction Transistor (BJT), Justify the relation IE = IB + IC. (From Chapter - Semiconductor Devices)

Answers

Answered by Agastya0606
2

Given: Bipolar Junction Transistor (BJT)

To find: Justify the relation I(E) = I(B) + I(C)

Solution:

  • The three terminals are known as the Emitter ( E ), the Base ( B ) and the Collector ( C ) respectively.
  • Now we know that α is I(C) / I(E) which is current gain.
  • β is I(C) / I(B) which is transistors current gain.

                   α =  I(C) / I(E)    ..............(i)

                   β =  I(C) / I(B)    ..............(ii)

  • From (i) and (ii), we get:

                   I(C) = α.I(E) = β.I(B)

  • As α = β / β + 1 and β = α / 1 - α, so:

                   I(E) = I(B) + I(C)

Answer:

            So the relation is justified.

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