Artificial Magnetic Fields — Electromagnetism (Physics Gr12)

[randomstu1997]

Homework Statement

Two parallel conductors each carry 10 A of current in the same direction.
a) What is the magnetic field strength at the midpoint between these wires? (answer = 0T)
b) What is the field strength at the same point if the current ran in opposite directions? (answer = 4.0x10^-4T)

I am very confused and any help would be greatly appreciated

 

[CWatters]

Are you familiar with the right hand rule..

Make some drawings of the magnetic field with two wires.

 

[randomstu1997]

Yes I am familiar with all three of them

 

[CWatters]

Then I suggest drawing two wires "end on" and adding circular B field lines around each. See what happens in the middle.

 

[randomstu1997]

Thanks, got it