JEE Advanced 2014 Paper 1

Two parallel wires in the plane of the paper are distance X0 apart. A point charge moving with speed u between the wires in the same plane at a distance X1from 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 the directions opposite to each other, the radius of curvature of the path is R2.If

X0

X1

=3.the value of

R1

R2

is