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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


A
r2
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B
r
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C
1r
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D
1r2
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Solution

The correct option is B r
Ex=dVdx=ky;Ey=dVdy=kx

E=E2x+E2y=kx2+y2=krEr

Physics

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