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How can one reverse the direction of magneticfield produced at the centre of a circular coilcarrying electric current? [1-mark, 2011]

Answer»

The direction of the magnetic field can be changed by changing the direction of the current. If a circular coil is carrying current in a clockwise direction then the direction of the magnetic field created at the centre of the coil will be inside the plane. And in a coil carrying current in an anti-clockwise direction will have the direction of the magnetic field outside the plan, at the centre of the coil.



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