A copper wire is originally at 25C . coppers temp coefficient resistivity is about 3.9x10^-3
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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?
Sikandar B.
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. Part A At what temperature, in °C, will its resistance be 0.29 Ω? T =
Suman K.
By what factor is the resistance of a copper wire changed when its temperature is increased from 20°C to 120°C? (The temperature coefficient of resistivity for copper = 3.9 x 10^-3/°C) Group of answer choices: 1.06, 0.77, 1.44, 1.39.
Adi S.
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