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A horizontal wire has one end fastened to a wall while the other end is pulled...

A horizontal wire has one end fastened to a wall while the other end is pulled with a force of 200 N. The wire has a length of 5 m, a volume mass density of 7,100 kg/m3 , and a resistivity of 6.9e-07 Ωm. A transverse pulse takes 0.2 s to travel the length of the wire. Calculate the electrical power dissipated by the wire while a current of 2 A is passing through the wire.

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Answer #1

Here we apply formula for velocity of wave on string and formula for resistance in terms of resistivity of wire and power dissipation across resistance R.

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