Mon September 17, 2012 By:
                                 l  P

pq is current carrying conductor in the plane of the paper as shown mention the direction of magnetic fields produced by it at points a and b .given r1

Expert Reply
Tue September 18, 2012
the direction of magnetic field is given by the right hand thumb rule.
Stretch out  your thumb and curl your fingers in a thumbs up position.
then the direction of thumb represents the direction of current and the curl of the  fingers represents the direction of magnetic field.
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