The current gain for a common emitter amplifi | vedclass

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(A) In a common emitter configuration,the current gain $\beta$ is given as $69$.We know the relationship between emitter current $I_{E}$,base current

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$0.1$

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(A) In a common emitter configuration,the current gain $\beta$ is given as $69$.We know the relationship between emitter current $I_{E}$,base current $I_{B}$,and current gain $\beta$ is $I_{E} = I_{B} + I_{C}$.Since $I_{C} = \beta I_{B}$,we have $I_{E} = I_{B} + \beta I_{B} = I_{B}(1 + \beta)$.Given $I_{E} = 7 \ mA$ and $\beta = 69$,we substitute these values into the equation:$7 \ mA = I_{B}(1 + 69)$$7 \ mA = I_{B}(70)$$I_{B} = \frac{7}{70} \ mA = 0.1 \ mA$.

The current gain for a common emitter amplifier is $69$. If the emitter current is $7 \ mA$,the base current is......$mA$

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