Question

Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then 

1. the solid rod A expands more than the hollow rod B 

2. the hollow rod B expands more than the solid rod A 

3. the hollow rod B contracts, but the solid rod A expands 

4. both the rods A and B expand the same.

Answer 1

Two rods A and B of the same metal, same length, but one solid and the other hollow, are heated to the same rise in temperature. Then both the rods A and B expand the same.