4. A transistor having a =0.99 and
VBE = 0.7V, is given in the circuit.
Find the value of the collector current.
[Ans: 5.33 mA]
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Answer:
Explanation:
β = α / 1-α
β = 99
On applyng voltage law,
( Ic + Ib ) 1 × 10 ³ + 10 ×10 ³ Ib + V Be + I E × 1 ×10³ = 12
I E = IC +IB
IC +IB ×1 ×10 ³+ 10 ×10 ³ Ib + V Be +IC +IB × 1 ×10³ = 12
2 (IC +IB ) ×1 ×10 ³+ 10 ×10 ³ Ib + V Be = 12
Ic + 6 IB = 11.2 / 2 ×10³
IB = Ic /β
Ic + 6 Ic /β = 11.2 / 2 ×10³
Ic = 5.33 m A
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