The figure to the right shows three parallel wires: each carry a current with ma

Question

The figure to the right shows three parallel wires: each carry a current with magnitude I in the directions drawn. The left wire carries a current out of the page and the two right wires current into the page. Two wires are a distance d apart and two wires are a distance 2d apart. What is the direction of the force on the center wire? Select One of the Following: (a) to the top of the page (b) to the bottom of the page (c) to the left of the page (d) to the right of the page (e) The force is zero.

Explanation / Answer

Magnetic field on the middel wire due to other current carrying wire is top of the page, so by using flemings left hand rule we can say,

if forefingure denotes the direction of magnetic field, the middle finger denotes the direction of current then thumb denotes the direction of force.

so the ans to this que must be towards the right

d)To the right of the page

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