Multiple choice

Superficial expansion can be defined as

  1. great increase in length

  2. increase in volume

  3. increase in length and breadth on heating

  4. all of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When a solid is in the form of a Lamina, its length and breadth increases on heating. Hence, its area also increases. This is known as the superficial expansion.