A rectangular loop is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. What is the magnitude of magnetic field at the point ‘x’ if a steady current ‘i’ is created in wires as shown in the figure below? Explain your answer.
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12th
Physics
Moving Charges and Magnetism
Force on Current Carrying Conductor
A rectangular loop carrying...
PHYSICS
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Asked on November 22, 2019 by
Hazel Shinghania
A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If steady current I is established in the wire as shown in fig., the loop will
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The long straight wire and side AB carry current in the same direction, hence will attract each other.
The long straight wire and side CD carry current in the opposite direction, hence will repel each other.
Force on side BC will be equal and opposite to force on side DA.
Since CD is farther from the wire than AB, the force of attraction on AB will exceed the force of repulsion on CD.
Hence, there will be a net force of attraction on the loop ABCD and it will move towards the wire.