JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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Analyzing +4 | -1

The length of a steel rod exceeds that of a brass rod by

5 \mathrm{~cm}

. If the difference in their lengths remains same at all temperatures, then the length of brass rod will be: respectively)

View answer and explanation

Correct option: C

10 \mathrm{~cm}

Option C (

10 \mathrm{~cm}

) is correct because the difference in length remains constant only when the ratio of their initial lengths equals the inverse ratio of their linear expansion coefficients.

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