Question

A transistor is connected in C - E mode. If collector current is 72 × 10^-5 A and α = 0.96, then base current will be ______.

पर्याय

• 28 μA

• 26 μA

• 24 μA

• 30 μA

Answer 1

A transistor is connected in C - E mode. If collector current is 72 × 10^-5 A and α = 0.96, then base current will be 30 μA.

Explanation:

I_C = 72 × 10^-5 A

α = 0.96

we know,

`beta=alpha/(1-alpha)=0.96/(1-0.96)=0.96/0.04=24`

`beta=I_"C"/I_"B"`

`thereforeI_"B"=I_"C"/beta=72/24xx10^-5=3xx10^-5=30  mu"A"`