(b) as shown in the picture, the direction of the current in both the wires on t

Question

(b) as shown in the picture, the direction of the current in both the wires on the left has been reversed. All four currents are still of equal magnitude. In what direction is the net magnetic field, because of these four wires, at the center of the square? left, right, up, down, into the screen, out of the screen, the net field is zero?

please help- the current answer is incorrect. I'll rate highly! (b) as shown in the picture, the direction of the current in both the wires on the left has been reversed. All four currents are still of equal magnitude. In what direction is the net magnetic field, because of these four wires, at the center of the square? left, right, up, down, into the screen, out of the screen, the net field is zero?

Explanation / Answer

a)

Here , Due to Symmetry ,

the field will due to all wires will cancel out each other

and the field at the centre is ZERO

b)

Here ,

Field is in same direction due to corner currents,

Here , at the centre of the square , the field points in left direction

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