Question

During summer, electrical wires sag due to _______.

• A. thermal expansion of solids
• B. thermal expansion of liquids
• C. thermal expansion of gases
• D. anomalous expansion

Answer 1

The correct option is A thermal expansion of solids

During summer, electrical wires sag due to thermal expansion of solids. The material of the wires expands thereby increasing in length, area, and hence, in volume.