1
Question
The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation magnetization, respectively, of the material are:
The figure gives experimentally measured B vs H variation in a ferromagnetic material. The retentivity, co-ercivity and saturation magnetization, respectively, of the material are:
Open in App
Solution
The correct option is D 1.0 T, 50 A/m and 1.5 T
Initially, The B value increases with H value, but becomes constant even when H is increased. This constant value of B is called saturation magnetization.
In the graph,
Saturation Magnetization=1.5 T
Retentivity: The magnetization retained(B) after the external field is removed (H) is called retentivity.
B value at H=0
From the graph, Retentivity=1 T
Co-ercivity: The reverse external field required to demagnetize the material.
H value for which B becomes zero.
From the graph, Coercivity=50 Am−1
Hence, option (D) is correct.
Initially, The B value increases with H value, but becomes constant even when H is increased. This constant value of B is called saturation magnetization.
In the graph,
Saturation Magnetization=1.5 T
Retentivity: The magnetization retained(B) after the external field is removed (H) is called retentivity.
B value at H=0
From the graph, Retentivity=1 T
Co-ercivity: The reverse external field required to demagnetize the material.
H value for which B becomes zero.
From the graph, Coercivity=50 Am−1
Hence, option (D) is correct.
Suggest Corrections
2
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
