1.

The temperature coefficient of resistance of a wire is 0.00125 per `.^oC`. At 300K, its resistance is 1 `Omega`. The resistance of the wire will be 2 `Omega` atA. 1154 KB. 1100KC. 1400KD. 1127K

Answer» Correct Answer - B
b. `R_2 = R_1 (1+alphaDeltaT)`
`2 = 1(1+00125 xx DeltaT) or DeltaT = 1/(0.00125) = 800`
or `T_2 - T_1 = 800 or T_2 = 800 + T_1 = 800 + 300 = 1100K` .


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