Question

Two straight infinitely long wires are fixed in space so that the current in the left wire

is 2 A and directed out of the plane of the page and the current in the right wire is 3

A and directed into the plane of the page. In which region(s) is/are there a point on

the x-axis, at which the magnetic field is

equal to zero due to these currents carrying wires? Justify your answer.​

Answer 1

In region-I: Magnetic field due to 2A and 3A current wire is in opposite direction.

In region-II:- Here, also magnetic field due to 2A and 3A currents wire is in opposite direction.

But, it is highly probable, in region I, that we can have neutral points, because B1 = 2μo/2πR1

; B2 = 3μo/2πR2

for region I, R2 > R1 and I2(3A) > I1(2A) and B1 and B2 are in opposite directions, so net magnetic intensity will become zero at existing neutral point