Answer it in GRECA Method please.. Two identical metallic spheres are suspended as bobs of a simple pendulum. Each of the bobs has a charge of -10.23x10-9 C. If each string is 1m long and makes an angle of 12 degrees to the vertical, (a) what is the electric force between the spheres? (b) The bobs touched each other and then separated. What then is the electric force between the spheres?

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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.