A Nichrome Wire and an Aluminum Wire, Each with the Same

question 28

Multiple Choice

A nichrome wire and an aluminum wire, each with the same initial resistance, have the same change in resistance when heated separately. (ρ_Al = 2.82 × 10−⁸ Ω ⋅ m; α_Al = 3.9 × 10−³ / °C; ρ_nichrome = 1.50 × 10−⁶ Ω ⋅ m; α_nichrome = 0.40 × 10−³ / °C.) The ratio of the temperature change of the nichrome wire to the temperature change of the aluminum wire is

• A) 0.019.
• B) 0.10.
• C) 0.18.
• D) 9.8.
• E) 53.

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