A 52-m length of wire is stretched horizontally between two vertical posts. The

Question

A 52-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 93 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 63.0

A 52-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 93 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 63.0 degree with respect to the wire.

Explanation / Answer

magnetic force F = ilB sin thea

B = F/(iL sin theta)

B = 0.15/( 52*93*sin 63)

B = 3.48 *10^-5 T

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