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Thermal Properties of Matter — Physics STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 SciencePhysicsThermal Properties of Matter2 Marks
Question
Why the metal wires for electrical transmission lines sag?
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Answer

  1. In hot weather, metal wires get heated due to increased temperature of surrounding. As a result, they expand increasing the slack between transmission line structure, causing them to sag.

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