An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $'I'$ along the same direction as shown in figure. Magnitude of force per unit length on the middle wire $'B'$ is given by
An arrangement of three parallel straight wires placed perpendicular to plane of paper carrying same current $'I'$ along the same direction as shown in figure. Magnitude of force per unit length on the middle wire $'B'$ is given by
- [NEET 2017]
- A
$\frac{{2{\mu _0}{I^2}}}{{\pi d}}$
- B
$\frac{{\sqrt 2 {\mu _0}{I^2}}}{{\pi d}}$
- C
$\;\frac{{{\mu _0}{I^2}}}{{\sqrt 2 \pi d}}$
- D
$\;\frac{{{\mu _0}{I^2}}}{{2\pi d}}$
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