A little sag is left in overhead telephone wires
(Please pick your answers with explanation(s))
A. because taut wires do not conduct sound easily.
B. to allow for the effect of a rise in temperature due to heating effect of current flowing through them.
C. to allow for the effect of a rise in temperature of the surrounding atmosphere.
D. to allow for the effect of a fall in temperature of the surrounding atmosphere.?
In Physics
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Asked by Wealth on 1st October, 2021
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