The resistance of a conductor at 0 is 4 ohm
What is resistance?
Resistance is opposition to the flow of current. The S I unit is ohm
the formular for resistance at a particular temperature T is RT = ( 1 + αT ) R
α = material constant
R=resistance at Zero degree Celsius.
At 50 degrees Celsius we have
R50 = ( 1 + 50 α ) R = 5 ohm
At 100 degrees Celsius we have
R100 = ( 1 + 100 α ) R = 6 ohm
At zero degrees Celsius we have
R0 = (1 + 0 ) R0 = R (3)
Solving for α
( 1 + 50 α ) / ( 1 + 100 α ) = 5 / 6
6 + 300 α = 5 + 500 α
6 - 5 = 500 α - 300 α
α = ( 1 / 200 )
substituting to solve for R we have:
( 1 + 50 α ) R = 5
( 1 + 50 * 1 / 200 ) R = 5
( 1 + 0.25 ) R = 5
R = 5 / 1.25
R = 4
Since R0 = R = resistance at 0∘C
So resistance 0 deg is 4 ohm.