Four parallel conductors, carrying equal currents, pass vertically through the four corners of a square WXYZ. In two conductors, the current is flowing into the page, and in the other two out 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 centre of the square?

Options

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

Answer

D

Explanation

(d) To get magentic field in resultant direction, current in X
should be in and that in Z should be out, I in W should be in
and that in Y should be out.