Question

magnetic field outside two parallel wires carrying a reverse current with a distane of D?
What are their conditions?

Answer 1

Magnetic field:

$\overrightarrow{B_1}=\frac{\mu i}{4\pi D}(.)$

$\overrightarrow B_2=\frac{\mu i}{4\pi D}(.)$

Hence, the net magnetic field,

$\overrightarrow{B}=\overrightarrow{B_1}+\overrightarrow{B_2}$

$=\frac{2 \mu i}{4\pi D}(.)$