Find magnetic field at the center of flat coil of insulated current carrying wire, i, where radius of infinite coil relates to r = a(1+theta^2).

The magnetic field at the center of flat coil is .

Explanation:

Given that,

Radius

We need to calculate the magnetic field at the center of flat coil

Using Biot-savart law

Here,

Then, the magnetic field

Put the value of r

Hence, The magnetic field at the center of flat coil is .