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A moving-coil meter, with internal resistance .

  1. Oct 22, 2012 #1
    A moving-coil meter, with internal resistance.....

    1. The problem statement, all variables and given/known data

    A moving-coil meter, with internal resistance Rmeter = 15 Ω produces full-scale deflection for a current of 13 mA. Design a voltmeter, as shown below, which can measure voltages in the range 0 - 14 V. What is the required value for Rseries?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 22, 2012 #2

    CWatters

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    Re: A moving-coil meter, with internal resistance.....

    Basically it's asking you to put the moving coil current meter into a box together with a resistor so you can call the whole thing a voltmeter.

    Draw the circuit and show it connected to a 14 V source/battery. Use what you know to work out what value of R gives full scale deflection whan connected to 14V.

    Come back if you are stuck.
     
  4. Oct 23, 2012 #3

    rude man

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    Re: A moving-coil meter, with internal resistance.....

    Voltmeter "as shown below"?
     
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