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Two straight infinitely long wires are fixed in space so that the current in the left wire is 2 A and directed out of the plane of the page and the current in the right wire is 3 A and directed into the plane of the page. In which region(s) is/are there a point on the x-axis, at which the magnetic field is equal to zero due to these currents carrying wires? Justify your answer. |
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Answer» In region-I: Magnetic field due to 2A and 3A current wire is in opposite direction. In region-II:- Here, also magnetic field due to 2A and 3A currents wire is in opposite direction. But, it is highly probable, in region I, that we can have neutral points, because B1 = \(\frac{2\mu_o}{2\pi R_1}\) ; B2 = \(\frac{3\mu_o}{2\pi R_2}\) for region I, R2 > R1 and I2(3A) > I1(2A) and B1 and B2 are in opposite directions, so net magnetic intensity will become zero at existing neutral point.(highly probable). Explanation by showing magnetic field directions in all three regions Concluding left of region 1. |
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