Physics

Problem

For a certain metallic wire, the following readings were recorded: At

25^{\circ}\text{C}

V = 10\,\text{V}

I = 2.0\,\text{A}

200^{\circ}\text{C}

V = 10\,\text{V}

I = 1.6\,\text{A}

(a) Calculate the resistance of the wire at each temperature. (b) Does the wire obey Ohm’s law over this temperature range? Justify your answer in one sentence.

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