A charged cork ball of mass 2.50 g is suspended on a light string in the presence of a uniform electric field as shown in the figure below. When  E  = (2.00 î + 4.60 ĵ) ✕ 105 N/C, the ball is in equilibrium at ? = 37.0°. Find the charge on the ball. Find the tension in the string.

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.