Answer:
The resistance of the wire increases by a factor of 1.3315
Explanation:
The relationship between resistance of a wire and its temperature change is given by
R = R₀ (1 + αΔT)
R = Resistance at any other temperature.
R₀ = Resistance at a reference temperature.
α = temlerature Coefficient of resistivity = 3.9 × 10⁻³ (°C)⁻¹
ΔT = difference in twmlerature between the current temperature and the reference temperature = 115 - 30 = 85°C
R = R₀ (1 + (0.0039)(85))
R = R₀ (1.3315)
R = 1.3315 R₀
(R/R₀) = 1.3315
