JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

1 Easy

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Application +4 | -1

What is the percentage change in length of 1m iron rod if its temperature changes by

{100^ \circ }C\,

\left[ {\alpha \,\,\mathrm{for}\,\mathrm{iron}\, = \,2 \times {{10}^{ - 5}}\,/{\,^ \circ }C} \right]

View answer and explanation

Correct option: A

0.002

Option A (0.20%) is correct because the percentage change in length is calculated using the formula

\alpha \Delta t \times 100

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