Question

I=10 ampere
r=1.5cm
Find Magnetic field at point O of a semicircle ​

Answer 1

Of a circular loop the magnetic field can be given by the formula u0i/4* r where u0 is called the permitivity in free space and has a value of 4pi * 10^-7.Using this find the magnetic field, which would be pi*10^-6/1.5