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Physics 7 Online
OpenStudy (anonymous):

A small charged sphere of mass m is suspended at the end of a string. When a uniform horizontal E field of 3.2*10^4NC^-1 is applied, the string makes an angle of 12 degrees with the vertical. a) Draw a diagram showing the forces acting on the sphere. b) If the mass of the sphere is 1g, calculate the charge on the sphere.

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