The temperature coefficient of resistance of a wire is `0.00125 ^(@)C^(-1)`. At 300K, its resistance is 1 `Omega`. The resistance of the wire will be 2 `Omega` at

Options

A. `1154 K`
B. `1100 K`
C. `1500 K`
D. `1127 K`

Answer

D

Explanation

(d) `(rho_(1))/(rho_(2)) = ((1 + alpha t_(1)))/((1 + alpha t_(2))) implies (1)/(2) = ((1 + 00125 xx 27))/((1 + 0.00125 xx t))`
`implies t = 854^(@)C implies T = 1127 K`