A magnetic circuit has a 20 cm lenght core with a permeability of 0.005 Wb/(Atm). The coil has 250 turns, and draws 0.4 ampere. Determine the flux density.
The magnetic flux density due to a coil is given by,
`=(mu*N*I)/l` (Where mu is the permeability of the solenoid, N, the number of turns, I, the current strength and l, the path length)
Plugging in the values,
Therefore, the flux density of the coil is 2.5 T.