17.(b) A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A, what is the magnetic field inside the core of the toroid?
The magnetic field inside the core of a toroid is given by
Total number of turns(N)=3500
Current flowing in toroid =11 A
Length of the toroid, l=
(r1=inner radius=25 cm, r2=outer radius=26 cm)