engineering recuitment GATE ECE 2023-24 Test Series Electromagnetic Theory Magnetostatics Biot Savart's Law
Two identical copper wires W1 and W2, placed in parallel as shown in the figure, carry currents I and 2I, respectively, in opposite directions. If the two wires are separated by a distance of 4r, then the magnitude of the magnetic field B between the wires at a distance r from W1 is
1
\(\frac{{{\mu _0}I}}{{6\;\pi r}}\)
2
\(\frac{{6{\mu _0}I}}{{5\;\pi r}}\)
3
\(\frac{{5{\mu _0}I}}{{6\;\pi r}}\)
4
\(\frac{{\mu _0^2{I^2}}}{{2\;\pi {r^2}}}\)