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Byju's Answer

Standard XII

Physics

Motional EMF in an Open Conductor

Figure shows ...

Question

Figure shows a wire sliding on two parallel, condu cting rails placed at a separation l. A magnetic field B exicts in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity v ?

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Solution

Since $F_{m a g n e t i c} = i l B$

This force produces an acceleration of the wire.

Since the velocity is given to be constant.

Hence net force acting on the wire must be zero.

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Figure shows a wire sliding on two parallel, condu cting rails placed at a separation l. A magnetic field B exicts in a direction perpendicular to the plane of the rails. What force is necessary to keep the wire moving at a constant velocity v ?

Since Fmagnetic=ilB This force produces an acceleration of the wire. Since the velocity is given to be constant. Hence net force acting on the wire must be zero.

Since $F_{m a g n e t i c} = i l B$

This force produces an acceleration of the wire.

Since the velocity is given to be constant.

Hence net force acting on the wire must be zero.