Question

A toroidal winding carrying a current of 5A is wound with 300 turns/m of the wire. The core of iron which has a magnetic permeability of 5000 SI unit under given condition .Find H,B andM unside the core​

Answer 1

1.88T as:

For a toroid, the magnetic field inside the iron is=B=μ
r
​
nI
∴B=5000×100×3×4π×10
−7
=1.88T