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A tiny pith ball of mass 5.0 x 10-4kg is suspended by a light thread of negligible mass. The ball
is electrically charged and placed in a uniform horizontal electric field. The field is generated by two
parallel plates maintained at potentials of 250V and 50V and a separation of 50 cm.
Calculate the charge q of the ball when it is deflected through an angle of 10°.

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