ESE 2021 Technical Quiz 71 || Magnetostatics-2

In a spherical co-ordinate system magnetic vector potential at point (r, θ, ϕ) is given as A = 12 cosθa_ϕ. The magnetic flux density at point (3, 0, ) will be

A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of the magnetic field inside the solenoid?

A magnetic material has the following parameters:

(i) M=120A/m and μ= 2 x 10^-4H/m.

(ii) B=200μT, X_m= 15

Determine magnetic field intensity and magnetic flux density for both (i) and (ii)

Given magnetic vector potential,  wb/m magnetic flux density is given by