How can a magnetic field be produced without using a magnet? - Vidyadip

Question

How can a magnetic field be produced without using a magnet?

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Answer

A small aluminum rod AB is suspended horizontally by using connecting wires as shown in the figure. A horse shoe magnet is placed vertically such that the magnetic field is directly upwards. When the key is inserted, the rod is deflected towards the left. The displacement is reversed when the direction of current in the rod is reversed. This shows that there is a force exerted on the current carrying conductor when it is placed in a magnetic field.

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