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  4. Four parallel conductors, carrying equal currents, pass vertically through the four corners of a square W X Y Z. In two conductors, the current is flowing into the page, and in the other two out of the page. In what directions must the currents flow to produce a resultant magnetic field in the direction shown at O, the center of the square ? <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/217b9a6d762f55935e0413ba67c49161-.png /> Into the page Out of the page a W and Y X and Z b X and Z W and Y c W and Z X and Y d W and X Y and Z

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Q. Four parallel conductors, carrying equal currents, pass vertically through the four corners of a square $W X Y Z$. In two conductors, the current is flowing into the page, and in the other two out of the page. In what directions must the currents flow to produce a resultant magnetic field in the direction shown at $O$, the center of the square ?
image
Into the page Out of the page
a W and Y X and Z
b X and Z W and Y
c W and Z X and Y
d W and X Y and Z

Moving Charges and Magnetism

Solution:

To get magnetic field in resultant direction, current in $X$ should be in and that in $Z$ should be out; current in $W$ should be in and that in $Y$ should be out.