In common base mode of a transistor, the collector current is 5.488 mA for an emitter current of 5.60 mA. The value of the base current amplification factor (\beta ) will be

  • Option 1)

    48

  • Option 2)

    49

  • Option 3)

    50

  • Option 4)

    51

 

Answers (1)

As we learnt in

Relation between emitter current ,Base current,collector current -

I_{E}= I_{B}+I_{C}
 

- wherein

I_{E}=Emitter\: Current

I_{B}= Base \: Current

I_{C}= Collector \: Current

 

 I_{E}=I_{C}+I_{B}

Here I= 5.6 mA

    IC = 5.488 mA

\therefore\ \, I_{B}=I_{E}-I_{C}=0.112\ mA

Current amplification factor

\beta=\frac{I_{C}}{I_{B}}=\frac{5.488}{0.112}=49

Correct option is 2.

 


Option 1)

48

This is an incorrect option.

Option 2)

49

This is the correct option.

Option 3)

50

This is an incorrect option.

Option 4)

51

This is an incorrect option.

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