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Calculate Rsh and R1

  1. Aug 26, 2014 #1
    1. The problem statement, all variables and given/known data

    A 1mA meter movement with an internal resistance of 50 Ohm is to be used. The battery voltage is 3V. Half scale deflection is 0.5 Ohm. Calculate the value of R1 and Rsh.

    2. Relevant equations

    Vsh = Vim

    IshRsh = ImRm

    3. The attempt at a solution

    I dont understand what it means by half scale deflection 0.5 Ohm. I thought scale deflection is in ampere. In order to find Ish I first need to know the value of I but I dont know what is I.
  2. jcsd
  3. Aug 26, 2014 #2


    User Avatar

    Staff: Mentor

    Yeah, the question is a little confusing at first. Is there a figure or other drawing that you can post that shows what R1 and Rsh are?
  4. Aug 26, 2014 #3
    I'm sorry but i dont have any diagram given. Only that question is given.
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