Q. When a ring of metal is heated what happens to its hole -

  • (A) it expands or contracts according to its coefficient of expansion
  • (B) expands
  • (C) contracts
  • (D) it expands or contracts according to its diameter
✅ Correct Answer: (B) expands

Published by Ram Sharma ⭐ 193.88K Points at 07-May-2022 06:38 pm in General Awareness

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