Percentage error in measuring the radius and mass of a solid sphere are 2 % & 1 % respectively. The error in measurement of moment of inertia about to its diameter is :-

Answer

`2`

Explanation

The charge at 'P' is in equilibrium
Hence `E_(P)=0, vec(E)_(P)=vec(E)_(Pa)+vec(E)_(Pb)=vec(0)`
`(Kqa)/((a^(2)+a^(2))^(3//2))-(Kq(2/5)^(-3//2))/((a^(2)+b^(2))^(3//2))=0rArr b/a=2`