A vertical straight conductor carries a current vertically upwards. A point P lies to the east of it a small distance and another point Q lies to the west at the same distance. The magnetic field at P due to the current carrying conductor is
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a
greater than at Q
b
same as at Q
c
less than at Q
d
greater or less than at Q depending upon the strength of the current
answer is B.
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Detailed Solution
Magnitude of magnetic field at any point due to a straight current carrying conductor depends only on the distance of the point with respect to current carrying conductorbut not on the side. Hence Bp = BQ (at same distance).