Question

A metallic ball has a spherical cavity at its centre. If the ball is heated, what happens to the cavity?

• A. Its volume increases
• B. Its volume decreases
• C. Its volume remains unchanged
• D. Its volume may decrease or increase depending upon the nature of heating process

Hint:

When metals expand due to heating, they expand in all directions, including expanding the cavities inside them.

Answer 1

The Correct Option is A

When a metallic ball is heated, it expands uniformly. This causes the ball to expand and the spherical cavity at the centre to increase in size. The metal expands outward, so the cavity volume increases as well. Hence, the correct answer is (a).