A square magnetic core has a mean length of 43 cm and a cross-sectional area of 120cm2 . A coil of 200 turns of wire is wound around one of the columns of the core, the which is made of a material...

A square magnetic core has a mean length of 43 cm and a cross-sectional area of
120cm2
. A coil of 200 turns of wire is wound around one of the columns of the core, the
which is made of a material whose required magnetic field strength is H=115 Aturns/m.

a) How much current is required to produce a flux of 0.012 Wb, in the core?
b) What is the relative permeability of the core for that current?
c) What is the reluctance?