Magnetic field due to currentHard
Question
Two isolated like magnetic poles of strength 10 and 40 S.I. units are separated by a distance 30 cm. The magnetic field is zero on the line joining them : -
Options
A.At a point 10 cm. from the stronger pole
B.At a point 20 cm. from the stronger pole
C.At the mid-point
D.At infinite
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