Two light spheres each of mass 2.0g are suspended by light strings 10cm in length. A uniform electric field |E| = 4.42 × 105N/C is applied in the horizontal direction. The charges on the spheres are equal and opposite. For what charge values will the spheres be in equilibrium at an angle θ = 10°

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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.