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Homework Help: How to calculate the percentage error for moving iron voltmeter?

  1. Feb 21, 2009 #1
    the moving iron voltmeter has resistance of 5k ohm at 15c when it reads correcectly when connected to a supply of 200V.
    and the copper coil's temperature coefficient at 15c is 0.004ohm/c.

    so what's the percentage error in the reading when it's 50c?
  2. jcsd
  3. Feb 21, 2009 #2
    Does the temperature coefficient remain the same from 15C° - 50C°?

    Before we can help, you have to provide an attempt at the solution. Or do you have a question about the problem statement itself?
  4. Feb 22, 2009 #3
    oh, it's ok now. ive got it already. thanks anyway. =)
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