Question

The figure gives experimentally measured B vs. H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation, respectively, of the material are:

(1) 150 A/m, 1.0 T and 1.5 T

(2) 1.0 T, 50 A/m and 1.5 T

(3) 1.5 T, 50 A/m and 1.0 T

(4) 1.5 T, 50 A/m and 1.0 T 

Answer 1

Answer is (2) 1.0 T, 50 A/m and 1.5 T 

Retentivity = 1.0 T

Co-ercivity = 50 A/m

Saturation = 1.5 T

Answer 2

Answer is (2) 1.0 T, 50 A/m and 1.5 T

x = retentivity

y = coercivity

z = saturation magnetization