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A current 'I' is flowing along an infinite, straight wire, in the positive Z-direction and the same current is flowing along a similar parallel wire 5m apart, in the negative Z-direction. A point P is at a perpendicular distance 3m from the first wire and 4m from the second. What will be magnitude of the magnetic field vec(B) at P? |
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Answer» `(5)/(12) (mu_(0I)`  Here is this case from the given DATA, MAGNETIC field due to first wire, `B_(1)= (mu_(0)I)/(2pi xx 3)` and magnetic field due to second wire, `B_(2)= (mu_(0)I)/(2pi xx 4)` `:.` Net magnetic field at point P, `B= SQRT(B_(1)^(2)+ B_(2)^(2))= (mu_(0)I)/(2pi) sqrt((1)/(9) + (1)/(16))= (mu_(0)I)/(2pi) xx sqrt((25)/(9 xx 16))= (mu_(0)I)/(2pi) xx (5)/(12)= (5mu_(0)I)/(24pi)` None of the given options is correct |
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