Q. A solid ball of metal has a concentric spherical cavity within it. If the ball is heated, the volume of the cavity will
A) Increase
B) Decrease
C) Remain unaffected
D) None of these
Explanation
(b) If the ball is heated then it will expand at free surface, so the ball will expand at outer and inner both surfaces. Hence, the volume of cavity which is inside the ball, decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.