Three similar charges `+q` are placed on `3` corners of an equilateral triangle `ABC` of side `a`.
Channel: Doubtnut
Date: 2020-01-19

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))/(4pi epsilon_(0)a^(2))` along `x`-axis,