How much work must be done to bring three electrons from a great distance apart to within 9.0 × 10-10 m from one another (at the
corners of an equilateral triangle)?
1 answer:
As we know that change in the potential energy of the system must be equal to the work done to bring the system of charges
here we know that

also here we have


now we will have


So here work done to bring three charges at the vertices of a triangle is given as

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