# Electic Charge

If a ring has charge Q on its material and a charge Q' is put on the center of the ring then what will be tansion on the ring due to electric force? The radius of the ring is R . Find increase in radius due to the tansion if young's modulus of the material of the ring is Y and crossection area is A.

[R^{2}= R to the power 2].

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