First slide

Thermal expansion

Question

A brass scale is accurate at 15°C . It is used to measure length of a cloth at 25°C . Measured length is

Easy

A

less than actual length of the cloth
B

greater than actual length of the cloth
C

equal to actual length of the cloth
D

none of the above

Solution

When scale expands, reading of the scale will be less than actual value.

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