A straight wire carries current in vertical upward direction. A point ‘P’ lies just east of it at a small distance and another point ‘Q’ lies to the west just same distance. The magnetic field at these points :- (consider earth magnetic field)
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a
BP>BQ
b
BP
c
BP=BQ
d
None
answer is A.
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Detailed Solution
Here B = Magnetic field due to wireBEH = Horizontal component of earth's magnetic field ⇒BP>BQ
A straight wire carries current in vertical upward direction. A point ‘P’ lies just east of it at a small distance and another point ‘Q’ lies to the west just same distance. The magnetic field at these points :- (consider earth magnetic field)