The sagging of overhead electrical wires is caused by
PHYSICS
WAEC 2023
The sagging of overhead electrical wires is caused by
- A. radiation of heat.
- B. rough handling.
- C. gravitational attraction
- D. Linear expansion
Correct Answer: D. Linear expansion
Explanation
Linear expansion is the tendency of materials to expand in length when they are heated. When overhead electrical wires are heated by the sun, they expand and sag.
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