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JEE Advanced2014PhysicsMagnetic Effects of CurrentActual

Two parallel wires in the plane of the paper are distance X 0 apart. A point charge is moving with speed u between the wires in the same plane at a distance X 1 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 R 1 . In contrast, if the currents   I in the two wires have directions opposite to each other, th

Correct answer

3

Step-by-step solution

B 1 = 1 2 μ 0 2 π 3 I x 0 R 1 = m v q B 1 R 2 = m v q B 2 ⇒ R 1 R 2 = B 2 B 1 = 1 3 1 9 = 3

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