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Physics (Electricity)

I need some help with 8)a) as I don't know how to approach this question... Please show working out!

Physics Electricity I need some help with 8a as I dont know how to approach this question Please show working out class=

Respuesta :

8(a) charges at A and B are 4q(of which its initially q and later 3q is added) and q respectively.

answer is [tex]4*4*10^{-5}[/tex]
Here are the 4 parts a-d.  
Ver imagen egenriether