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Question

The electric potential at a point (x, y) in the x - y plane is given by V = - kxy. The field intensity at a distance r from the origin varies as
  1. r
  2. r2
  3. 1r
  4. 1r2


Solution

The correct option is A r

Ex=dVdx=ky; Ey=dVdy=kx
E=E2x+E2y=kx2+y2=krEr

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