Question

Electrical wires stretch and sag during summer, because it expands on heating.

• A. True
• B. False

Answer 1

The correct option is B. True.

Metals expand in heat and shrink in cold temperatures. Electrical wires being made of metals become warmer due to rising temperature and expand in both length and diameter. That is why they sag in summer. In winters, they are cooler and hence they shrink.