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6. It can be shown that the electric force exerted on a moving charge between large pole faces of a horseshoe magnet is given by 4nkimqUP m/e Nite: the lare pole the n-pale is also,ド charge. where A is the area of the pole face. What velocity (parallel to the pole face) does an electron require to orbit in a circular path of radius 1 cm? The pole strength of the magnet is 100 unit poles and the radius of the pole face is 10 cm. (ans. 7x106 m/s)

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