The resistivity of a metal increases slightly with increased temperature This can be expressed as 0 1 (T T 0 ) , where T 0 is a reference temperature, usually 20C, and is the temperature coefficient of resistivity For copper, 3 9 10 3 C 1 Suppose a long, thin copper wire has a resistance of 0 25 at...

Model The resistance of a wire is R LA Visualize We are given 0 1 T T 0 The temp ...

The resistivity of a metal increases slightly with increased temperature. This can be expressed as =

Question:

The resistivity of a metal increases slightly with increased temperature. This can be expressed as ρ = ρ₀[ 1 + α(T - T₀)], where T₀ is a reference temperature, usually 20°C, and α is the temperature coefficient of resistivity. For copper, α = 3.9 × 10^-3°C^-1 . Suppose a long, thin copper wire has a resistance of 0.25 Ω at 20°C. At what temperature, in °C, will its resistance be 0.30 Ω?