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

question 15

Multiple Choice

A nichrome wire and an aluminum wire, each with the same initial resistance, have the same change in resistance when heated separately.( $\rho$ Al = 2.82 * 10-8 $\Omega$ . m; $\alpha$ Al = 3.9 * 10-3 / $\degree$ C; $\alpha$ nichrome = 1.50 *10-6 $\Omega$ . m; $\alpha$ nichrome = 0.40* 10-3 / $\degree$ 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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