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Two metal strips that constitute a thermostat must necessarily differ in their _______________(a) Mass(b) Length(c) Resistivity(d) Coefficient of linear expansion |
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Answer» The correct choice is (d) Coefficient of linear expansion To explain: Thermostat is used in electric apparatus like a refrigerator, Iron etc for automatic cut off. Therefore for metallic strips to bend on heating their coefficient of linear expansion should be different. |
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