Point charge +4q,-q and +4q are kept on the x-axis at points x 0,x a and x = 4a respectively. Then: A Only-q is in stable equilibrium None of the charges are in equilibrium. C All the charges are in unstable equilibrium. All the charges are in stable equilibrium.

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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.