First slide

Thermal expansion

Question

If the length of a body is measured in centimeters instead of meters, the coefficient of linear expansion

Easy

A

increases
B

decreases
C

remains same
D

decreases to 1/100 of the original value

Solution

Co-efficient of thermal expansion is defined as the fractional change in length per degree change in temperature .It does not depend upon unit of length but it depends upon the unit of temperature.So option (3) is right.

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