Question

Calculate the value of magnetic field at a
distance of 2 cm from a very long straight
wire carrying a current of 5 A (Given:
410 10-' Wb/Am).​

Answer 1

d = 2cm = 2×10^-2

B= uI/2πd

B= 4π×10^-7 × 5/2π × 2×10^-2

By solving we get,

B= 5× 10^-5 T

So the answer is : Magnetic field value is 5× 10^-7 Tesla