A wire bent into a semicircle of radius R forms a closed circuit and carries a c

Question

A wire bent into a semicircle of radius R forms a closed circuit and carries a current I. The wire lies in the xy plane, and a uniform magnetic field is directed along the positive y axis as in the figure. Find the magnitude and direction of the magnetic force acting on the straight portion of the wire and on the curved portion.

then

Calculate the magnitude of the magnetic force per unit length exerted on a conductor carrying a current of 17.7 A in a region where a uniform magnetic field has a magnitude of 0.73 T and is directed perpendicular to the conductor. (in N/m)

Explanation / Answer

magnetic field = (17.7A)*(0.73T)

= 12.92 N/m   

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