A ring of radius R is placed in the plane its centre at origin and its axis along the x-axisand having uniformly distributed positive charge. A ring of radius r(ltltR) and coaxial with the larger ring is moving along the axis with constant velocity , then the variation of electrical flux (phi) passing through the smaller ring with position will be best represent by :

A ring of radius R is placed in the plane its centre at origin and its

1.	A ring of radius R is placed in the plane its centre at origin and its axis along the x-axisand having uniformly distributed positive charge. A ring of radius r(ltltR) and coaxial with the larger ring is moving along the axis with constant velocity , then the variation of electrical flux (phi) passing through the smaller ring with position will be best represent by :
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