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Math Help - Physics - Circuit Analysis

  1. #1
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    Physics - Circuit Analysis

    Hi MHF

    Find the value of r2 in the voltage divider, which would give an output voltage of 2.0v

    Vin=6.0v
    R1=3.0 (resistor)
    R2=?
    Vout=2.0v

    the two resistors are in a line and the out voltage is take from r2
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  2. #2
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    Quote Originally Posted by iFuuZe View Post
    Hi MHF

    Find the value of r2 in the voltage divider, which would give an output voltage of 2.0v

    Vin=6.0v
    R1=3.0 (resistor)
    R2=?
    Vout=2.0v

    the two resistors are in a line and the out voltage is take from r2
    Substitute into the voltage divider formula you will undoubtedly have in your class notes or textbook. If you need more help, please show your work and say where you get stuck.
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  3. #3
    MHF Contributor Unknown008's Avatar
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    Actually with the given information, it's impossible to get the answer, for there are infinite possibilities.
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  4. #4
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    Quote Originally Posted by Unknown008 View Post
    Actually with the given information, it's impossible to get the answer, for there are infinite possibilities.
    Not so. There is one answer, easily found by substituting the given data into the voltage divider formula and solving the resulting equation.
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  5. #5
    MHF Contributor Unknown008's Avatar
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    Maybe I'm misunderstanding the question then... ok. Thanks!

    I think I found out what I thought it was. I thought it was like in the first diagram, where there are no solution, but there is in the second.

    Last edited by Unknown008; February 11th 2011 at 11:25 PM.
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  6. #6
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    Quote Originally Posted by Unknown008 View Post
    Maybe I'm misunderstanding the question then... ok. Thanks!

    I think I found out what I thought it was. I thought it was like in the first diagram, where there are no solution, but there is in the second.

    A key phrase in the OP was "voltage divider".
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