Question

which of the following is correct in case of thermal expansion ?
( A )smaller rod ofa metal expands more than a longer rod of the same metal.
( B ) A longer rod of a metal expands more than a smaller rod of the same metal
( C )When two rods of the same metal having the same length are heated to different temperatures, they expand same.
( D )Thermal expansion does not depend on the nature of the metal​

Answer 1

Explanation:

So the expansion will be more for the rod having longer length for same rise in temperature.

If same quantity of heat supplied then the rise in temperature will be same in both the rod because mass and specific heat capacity is same for both the rod.

So the rod with longer length will expand more.