How to calculate the percentage error for moving iron voltmeter?

[kloong]

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?

 

[mplayer]

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?

 

[kloong]

oh, it's ok now. I've got it already. thanks anyway. =)