A semi circular arc of radius $r$ and a straight wire along the diameter, both are carrying same current $i.$ Find out magnetic force per unit length on the small element $P$, which is at the centre of curvature.
A semi circular arc of radius $r$ and a straight wire along the diameter, both are carrying same current $i.$ Find out magnetic force per unit length on the small element $P$, which is at the centre of curvature.
- [AIIMS 2019]
- A
$\left(\frac{\mu_{0} i^{2}}{4 r}\right)$
- B
$\left(\frac{\mu_{0} i^{2}}{2 r}\right)$
- C
$\left(\frac{\mu_{0} i^{2}}{r}\right)$
- D
$\left(\frac{2 \mu_{0} i^{2}}{r}\right)$
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