Question

20. the current gain for a transistor working as common-base amplifier is 0.96. If the emitter current is 7.2 ma, then the base current is

Answer 1

Answer:

0.29mA

Explanation:

The Current gain for a transistor working as common-base amplifier = α=0.96  

The emitter current = IE=7.2mA

According to the equation of current we will get-

α = Ic × IE

Ic =0.96×7.2

= 6.1mA

Now, to calculate the base current, the equation will be-

IE = Ic+Ib or Ib = Ic-IE

Ib = 7.2−6.91

= 0.29mA

Therefore, If the emitter current is 7.2 ma, then the base current is 0.29mA