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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Three similar charges +q are placed on 3 corners of an equilateral triangle ABC of side a. How many minimum charges should be placed on a circle of radius a with centre at A so that resultant force on the charge placed at the centre is q^2 / 4πε0a2 along x-axis,

Three similar charges +q are placed on 3 corners of an equilateral triangle ABC of side a. How many minimum charges should be placed on a circle of radius a with centre at A so that resultant force on the charge placed at the centre is q^2 / 4πε0a2 along x-axis,

at θ=180∘ we see that Fnet=2F0. (a) For the situation corresponding to curve 1 what is that ratio? what is the ratio of the charge of particle C to that of particle B (including sign)? (b) For the situation corresponding to curve 2