16. A positive charge ‘Q’ is fixed at a point . A negatively charged particle of mass ‘m’ and charge ‘q’ is revolving in a circular path of radius ๐‘Ÿ_1 with Q as the centre . The work to be done to charge the radius of the circular path from ๐‘Ÿ_1 to ๐‘Ÿ_2 in joules is 0 ๐‘ž๐‘„/(4๐œ‹∈_0 ) [1/๐‘Ÿ_1 −1/๐‘Ÿ_2 ] ๐‘ž๐‘„/(4๐œ‹∈_0 ) [1/๐‘Ÿ_1 −1/๐‘Ÿ_2 ] 1/๐‘˜ ๐‘ž๐‘„/(4๐œ‹∈_0 ) [1/๐‘Ÿ_2 −1/๐‘Ÿ_1 ]

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