Question

Resistance of material at 10 degree Celsius and 40degree Celsius are 45&85 ohm find its temperature coefficient of resistance

Answer 1

Explanation:

from the equation

R=R⁰(1+alpha(∆T)) ----------1

u can find ur ans

here

∆T=T-T⁰

T=40⁰C

=273.15+40k

=313.15K

T⁰=10⁰C

=10+273.15k

=283.15K

R=85Ω

R⁰=45Ω

putting all this value in equation one we get

85=45[1+@(313.15-283.15)]

@=(85-45)/45(313.15-283.15)

@=40/1350

@=2.96×10^-2 K^-1

hope u understood my solution...