Physics, asked by anushkarajput3525, 8 months ago

Standard coil marked 2 ohm is found to a resistance of 2.118ohm at 30degree Celsius calculate the temperature at which marking in correcting the temperature coefficient of the resistance of the material of the coil is 0.0042degree Celsius

Answers

Answered by ramsmedicine
3

Answer:2k290.

Explanation: t=300K=300−273=27∘C

R27=R0(1+α×27)

R27=R0(1+α×27)……(i)

∴3.115=R0(1+4.3×10−3×27) ....(i)

and 3=R0(1+4.2×10−3×t)…..(ii)

∴33.115=1+4.2×10−3×t1+4.2×10−3×27

On solving we get t=17.21∘C

=17.21×275=290.2K

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