Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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. =)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook