Question

The flow of a current in a circular loop of a wire creates a magnetic field at its centre.
How can existence of this field be detected? State the rule which helps to predict the
direction of this magnetic field.
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Answer 1

Answer:  The flow of current in a circular wire creates a magnetic field at its centre. It states that if you hold a current-carrying conductor in right hand, such that the thumb points in the direction of electric current, then the direction in which fingers encircle, gives the direction of magnetic field.