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Given:- radius =12cm=12 xx10^(-2)mCharge, q=7muC=7xx10^(-6)CElectric fild formulaE=(kq)/(r^(2))(a) quad E=(9xx10^(9)xx7xx10^(-6))/((10 xx10^(-2))^(2)(m))But we know that charge sesides only on the surface and 10cm < radius i.e it is insicle th ... See the full answer