A square loop made of copper wire is falling out of a region where there is a ma

Question

A square loop made of copper wire is falling out of a region where there is a magnetice field Bext = 0.12 T. The loop is falling with a constant velocity because of the current induced in the loop.

What is the velocity of the loop? Give your answer in m/s to at least three significant digits.

It will be useful to know that:

The mass density of copper (mass per volume) is 9.0x103 kg/m3.

The resistivity of copper is ? = 1.7x10-8 ?-m.

Remember that the resistance of a wire of length L and cross-sectional area A is R = ? L/A.

Explanation / Answer

A square loop made of copper wire is falling out of a region where there is a ma

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