Question

A positively charged sphere of radius 10 cm is surrounded by a medium of dielectric constant 10. If the magnitude of the electric field intensity of a point outside the sphere at a distance 'r' from the centre of the sphere is 6.4 x 10-4 V/m, and the charge on the sphere is 6.4 x 10-12 C. Find 'r'. 6.​

Answer 1

Answer:

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