# A circular coil of one turn is formed by 6.28m length wire, which carries a current of 3.14A the magnetic field at the centre of coil is?Ans; 2×10^-6

Khimraj
3007 Points
4 years ago
Khimraj
3007 Points
4 years ago
Radius of coil is given by
2*3.14*r = 6.28
r = 1m.
Magnetic field at centre of cil is given by
B = uoI/2r
B = (4$\pi$*10-7*3.14)/(2*1)
B = 6.28$\pi$*10-7 Tesla.