Two parallel conducting wires sit along the direction of the z axis as shown bel

Question

Two parallel conducting wires sit along the direction of the z axis as shown below. Wire i crosses the x-axis at x =-2 cm and carries a current of 1 A out of the xy-plane of the page. Wire 2 (right) crosses the x axis at x -2 cm and carries a current of 6 A into the xy plane. (There are no other sources of fields besides these two wires) GIVEN THE NUMERICAL DATA ABOVE, consider the statments below. (Select T-True, F-False, If the first is T and the rest F, enter TFFFF A) The B-field must be zero at some point on the x-axis a finite distance to the right of the rightmost wire B) At the origin, the B-field points in the +y direction C) The two wires attract one another. D) The B-field could be zero at some point on the x-axis in between the two wires E) The B-field must be zero at some point on the x-axis a finite distance to the left of the leftmost wire

Explanation / Answer

A)False

Can be zero at left.

B)True

The net B field at origin points in +y

C)False

they carry current in apposite direction, hence repel each other.

D)False

Between the wires B field can not be zero as they carry currents in apposite direction.

E)True

Yes, B field can be zero in the left.

FTFFT

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