Question

Suppose the resistance of a copper wire is 1.05 N at 30°C.

Find the temperature at which the resistance becomes 1.50
Ω.

Answer 1

42.9°C

Step-by-step explanation:

Resistance of a conducting material is directly proportion to Temperature, that is, when being heated, their is more of collisions between the molecules of the material which as a result offers more opposition to the flow of current through it.

therefore R=kT

where R=resistance of the wire

T=Temperature

k= proportionality constant

when R=1.05 T=30°C

so k=1.05/30

k=0.035

when R=1.5 k=0.035

so T=1.5/0.035

T=42.9°C. or 43°C approximated