Please Help With Physics?

Question

A wire carries a 8.0 A current at an angle 90.0° from the direction of a magnetic field. If the magnitude of the magnetic force on a 4.9 m length of the wire is 15.0 N, what is the strength of the magnetic field?

Answer 1

force F = I * L * B * sinΘ
15.0 N = 8.0A * 4.9m * B * sin90º
B = 0.38 T

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