I need help, and iWILL RATE W Assignment #12 Begin Date: 9/24/2018 4:00:00 PM-Du

Question

I need help, and iWILL RATE

W Assignment #12 Begin Date: 9/24/2018 4:00:00 PM-Due Date: 9/26/2018 11:00:00 PM End Date: 12/7/2018 4:00:00 PM (33%) Problem 3: A thin and uniformly positively charged ring of radius R = 0.35 m and net electric charge Q 3.5 mC is lying in the x-y plane. The z-axis is perpendicular to the plane of the ring and passes through the center of the ring. The ring is rotating around the z-axis with angular frequency = 6.5 rad/s in the presence of an external uniform magnetic field directed perpendicular to the plane of the ring (i.e., parallel to the angular velocity vector) What is the magnetic potential energy (in W) of the ring if the magnitude of the external magnetic field is 0.65 T? Grade Summary Deductions Potential m,dipole -I

Explanation / Answer

Current, I = Q/t

Time t = 2 pi/w

I = Qw/2 pi

U = - QwAB cos(theta) / 2 pi

U = - (0.0035 x 6.5 x pi x 0.35^2 x 0.65 x cos0) / 2 pi

U = - 905.73 uJ

Magnitude is 905.73 uJ (Ans)

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