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JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER
1
Medium
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Understanding
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Assertion (A): Invar is used in metal tapes, balance wheels and pendulum clocks
Reason (R): The coefficient of linear expansion of invar is very low
Reason (R): The coefficient of linear expansion of invar is very low
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Correct option: A
If both (A) and (R) are true and (R) is the correct explanation of (A).
Option A (If both (A) and (R) are true and (R) is the correct explanation of (A).) is correct because Invar is used in metal tapes, balance wheels, and pendulum clocks due to its very low coefficient of linear expansion.
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