What is the magnetic field at the center of a circular loop
ofwire of radius 4.0cm when a current of 2.0a flows in
thewire?

The magnetic field at the center of a circular loop is .

Explanation:

Given that,

Radius = 4.0 cm

Current = 2.0 A

We need to calculate the magnetic field at the center of a circular loop

Using formula of magnetic field

Where, I = current

r = radius

Put the value into the formula

Hence, The magnetic field at the center of a circular loop is .