Two parallel wires in the plane of the paper are distance X 0 apart. A point charge is moving with speed u…

Two parallel wires in the plane of the paper are distance X0 apart. A point charge is moving with speed u between the wires in the same plane at a distance X1 from one of the wires. When the wires carry current of magnitude  I  in the same direction, the radius of curvature of the path of the point charge is R1 . In contrast, if the currents  I in the two wires have directions opposite to each other, the radius of curvature of the path is R2 . If X0X1=3 , value of R1R2 is

Solution


B1=12μ02π3Ix0
R1=mvqB1

R2=mvqB2
R1R2=B2B1=1319=3 `

Asked in: JEE Advanced 2014 (Paper 1)

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