A charged pith ball of mass 0.12 kg is suspended between parallel plates. The negative plate is on the bottom, and the plates are 0.5m apart. The pith ball is located where the potential is zero. Find a) the strength and direction of the electric field, b) the sign of the charge on the pith ball, c) the potential at the location of the pith ball, and d) what would happen if the pith ball were moved to a point 0.15 m above the negative plate. Show your work and explain your reasoning.
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