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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2017
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An arrangement of three parallel straight wires placed perpendicular to plane of papei carrying same current'I' along the same direction is shown in the figure . Magnitude of force per unit length on the middle wire'B' is given by

(1)μ0i22πd(2)2μ0i2πd(3)2μ0i2πd(4)μ0i22πd

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