A platinum wire has a resistance of 2. 62$\mathrm{\Omega }$ at 15°C and 3.29 $\mathrm{\Omega }$ at 80°C. Find the temperature coefficient of the resistance of platinum wire.

• A

  $4.18\times {{10}^{-3}}^{\circ }{\mathrm{C}}^{-1}$

• B

  $9.34\times {{10}^{-3}}^{\circ }{\mathrm{C}}^{-1}$

• C

  $1.934\times {{10}^{-3}}^{\circ }{\mathrm{C}}^{-1}$

• D

  $934\times {{10}^{-3}}^{\circ }{\mathrm{C}}^{-1}$