In the given figure, given that VBB supply can vary from 0 to 5.0 V, , The minimum base current and the input voltage at which the transistor will go to saturation, will be, respectively :
Option 1) 25 and 3.5 V
Option 2) 25 and 2.8 V
Option 3) 20 and 2.8 V
Option 4) 20 and 3.5 V
Relation between emitter current ,Base current,collector current -
- wherein
At saturation
We known that
So
So