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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Four charges are rigidly fixed along the y – axis as shown. A positive charge approaches the system along the x- axis with initial speed just enough to cross the origin. Then its total energy at the origin is

Four charges are rigidly fixed along the y – axis as shown. A positive charge approaches the system along the x- axis with initial speed just enough to cross the origin. Then its total energy at the origin is

A very large sphere having charge Q uniformly distributed on the surface is compressed uniformly till its radius reduces to R. The work done by the electric forces in this process is