A conductor suspended by two flexible wires as in the figure has a mass per unit

Question

A conductor suspended by two flexible wires as in the figure has a mass per unit length of 0.36 kg/m.

The acceleration of gravity is 9.8 m/s2 .

What current must exist in the conductor in order for the tension in the supporting wires to be zero when the magnetic field is 5 T into the page? Answer in units of A.

**Show Work

A conductor suspended by two flexible wires as in the figure has a mass per unit length of 0.36 kg/m. The acceleration of gravity is 9.8 m/s2 . What current must exist in the conductor in order for the tension in the supporting wires to be zero when the magnetic field is 5 T into the page? Answer in units of A. **Show Work

Explanation / Answer

Ampere force F = B * I * L must be equal to m*g.

m*g = B * I * L, where m = ro * L; ro - linear density

ro * L * g = B * I * L

I = ro * g/ B = 0.36* 9.8 / 5.0 = 0.7056 A

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