WAEC Physics 2023 Objective — Question 29
Question 29 of 50 from the West African Examinations Council (WAEC) Physics 2023 Objective paper, with the correct answer and a full explanation.
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The sagging of overhead electrical wires is caused by
- A. rough handling
- B. radiation of heat
- C. linear expansionCorrect
- D. gravitational attraction
Explanation
Other consequences of linear/thermal expansion include buckling of railway lines, cracking of glass tumblers due to excessive heating, and sagging of telephone/overhead cables.
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