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Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.
 
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The above diagram shows that a circular loop of wire lying in the plane of the table.
 
A battery is used to pass the current in a clockwise direction, as shown in the figure.
 
If we apply the right-hand thumb rule to the left side of the loop, then the direction of magnetic field lines inside the loop , while outside the loop, they .
 
If we apply the right-hand thumb rule to the right side of the loop, then the direction of magnetic field lines inside the loop , while outside the loop, they .