A straight conducting wire carries a 7.9 A current in the + y -direction. Part A

ID: 1424028 • Letter: A

Question

A straight conducting wire carries a 7.9 A current in the +y-direction.

Part A

Find the magnitude of the magnetic field that results in a force per unit length on the wire of 0.12 N/min the z-direction.

Express your answer to two significant figures and include the appropriate units.

Part B

Find the direction of the magnetic field that results in a force per unit length on the wire of 0.12 N/min the z-direction.

Find the direction of the magnetic field that results in a force per unit length on the wire of 0.12 in the -direction.

A. y-direction B. +x-direction C. x-direction D. +y-direction

Since it's a perpendicular theta, and B is in N / A * m, simply divide by 7.9 A.

So, the magnitude of the magnetic field = 0.12/7.9 = 0.0152 T

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