q the resistance of a platinum wire at 0oc is 4

Question

Q The resistance of a platinum wire at 0^oC is 4 Ω. What will be the resistance at 100^oC, if the temperature coefficient of resistance is 0.0038/^oC.

 Resistance at 100^oC R_t = R_o (1+ αt)

                                                                = 4 (1 + (0.0038 × 100))

R_t = 5.52 Ω

Result: The resistance increases with the temperature.