Question

magnetic filed at the centre of regular polygons which are formed by constant current carrying wire in equilateral triangle

Answer 1

1)\[\mu oI/2\sqrt{3} \pi a\]
2)\[27\mu oI / 2\pi a\]
3)\[9\mu oI/2\pi a\]
4)\[\sqrt{3} \mu oI/\pi a\]

Answer 2

option 3 i get