1. A rectangular frame of stiff wire with resistance 10Ω is moved horizontally at a uniform velocity of 2ms-1 into a uniform field of 3T between the poles of the magnet shown below.Calculate the force required to keep the wire moving at a constant velocity for a distance of 1m.Sketch a graph of the variation of the force as the wire moves a total distance of 4mSolution2. A circular disc rotates in a uniform perpendicular...