Question

We know when current 'i' is passed through a thin circular coil the magnetic induction on the axis of the coil at a distance 'x' from the center is B=µoir^2/2(r^2+x^2)^3/2

Now magnetic induction at centre of coil means 'x' becomes zero and B=µoi/2r
QUESTION: Now our college sir gave that to know the magnetic field "on" the circular coil x will be equal to r and field on the surface is B=µoi/(2^5/2)r .. Is it correct I am thinking we should not do like that because x is the length along the axis how can we take x=r.. distance from centre to any point on the coil will be 'r'.. But how can we take x=r??? Can anyone please explain weather it is correct or wrong.. And also i am thinking field on the coil must be zero according to oersted's experiment.. Please say weather i am correct or wrong

Answer 1

no your answer is wrong

Explanation:

no no no no no no no uranswer is wrong