The current gain for common emitter ampl...

The current gain for common emitter amplifier is 69. If the emitter current is `7.0 mA`, find (i) base current and (ii) collector current.

9.6 mA

6.9 mA

0.69 mA

69 mA

Text Solution

Verified by Experts

Given that emitter current `I_(E) = 7 mA`
Let emitter and collector current be `I_(E)` and `I_(c )`
`beta= (I_(c ))/(I_(E)) = 69`
Let `(I_(c))/( I_(E)) = alpha`
`I_(c ) xx I_(E) xx (69)/( 70) =7 xx (69)/( 70) =6.9 mA`

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