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Homework Help: BJT Circuit Problem

  1. Mar 9, 2014 #1
    1. The problem statement, all variables and given/known data
    Here is the diagram and solution for the problem:

    The only problem I have is how the solution was able to find the voltage Vc so fast. They got the answer 3V without showing any work?
  2. jcsd
  3. Mar 9, 2014 #2


    User Avatar

    Staff: Mentor

    Were you told that VE = 7v? That means IE is 3mA. With IC practically equal to IB, that 3mA passes through the collector resistor to ground.
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