InterviewSolution
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InterviewSolution
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Two long parallel wires, AB and CD, carry equal currents in opposite directions. They lie in the x-y plane, parallel to the x-axis, and pass through the points (0,-a,0) and (0,a,0) respectively, Figure. The resultant magnetic field is: A. zero on the x-axisB. maximum on the x-axisC. directed along the z-axis at the origin, but not at other points on the z-axisD. directed along the z-axis at all points on the z-axis. |
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Answer» Correct Answer - B::D The magnetic field at a point on x-axis due to currents through AB and CD will be maximum, given by `B=B_1+B_2=(mu_0)/(4pi)(2I)/(a)+(mu_0)/(4pi)(2I)/(a)=(mu_0I)/(a)` acting along z-axis The resultant magnetic field will be directed along the z-axis at all points on the z-axis. |
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