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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > In the figure shown a conducting sphere of inner radius a and outer radius b is given a charge Q. A point charge q is placed in the cavity of the sphere at distance x away from the centre. Find the electric field intensity and electric potentials at point P at distance r>b. Also find the electric potential at point C.

In the figure shown a conducting sphere of inner radius a and outer radius b is given a charge Q. A point charge q is placed in the cavity of the sphere at distance x away from the centre. Find the electric field intensity and electric potentials at point P at distance r>b. Also find the electric potential at point C.

Three equal charges Q are placed at the vertices of an equilateral triangle. What should be the value of a charge that when placed at the centroid reduces the interaction energy of the system to zero.