Transistor homework question

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Discussion in 'Homework Help' started by electo101, Nov 16, 2007.

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  1. Nov 16, 2007 #1
    electo101

    Thread Starter Member

    Nov 15, 2007
    12
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    .1.1.1.1.1.1
     
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  2. Nov 16, 2007 #2
    hydra504

    Member

    Oct 18, 2007
    16
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    What is the value for Alpha and VBE?

    If Alpha = 1 then you can say that IE and IC are equal.

    With that 25mA, you can find VC just by using KCL. It should be

    10V-VC/270 = 25mA

    VC = ......

    From there you can use the other formula

    VCE= VC - VE

    If VBE = 0.7V....
    -----------------
    VB = 5V this is the base volatge it already have a +5V volatage source connected to it.

    VBE = VB - VE

    0.7 = 5V - VE

    VE = 4.3V
    -----------------
     
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  3. Nov 16, 2007 #3
    electo101

    Thread Starter Member

    Nov 15, 2007
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    10101010101
     
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  4. Nov 16, 2007 #4
    electo101

    Thread Starter Member

    Nov 15, 2007
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    1001010001
     
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