If a Wire Resistance is 10 ohm at 0 DegC and the same wire Resistance becomes 15 ohm at temperature 100 DegC, then at what temperature the wire Resistance will be 30 ohm? Temperature coefficient of the wire material is 0.0047.

Answer 1

resistance=Ro(1+.0047T)
Ro=10 ohm, given
check:
R@100=10(1+.0047*100)=10(1+.45)=15ohm

30=10(1+.0047T)
3=1+.0047T
T=2/.0047=426C