Question

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

• A. $1.5T,50A/m,1T$
• B. $1T,50A/m,1.5T$
• C. $1.5T,50A/m,1T$
• D. $150A/m,1T,1.5T$

Answer 1

The correct option is B

$1T,50A/m,1.5T$

Step 1: Given Data:

Step 2: Explanation:

In the above the diagram, $x$ is retentivity, $y$ is coercivity and $z$ is saturation magnetization.

1. $x$ is retentivity or remanence is the ability of a magnetic substance to retain magnetism even in the absence of a magnetizing field.
2. $y$ is coercivity is defined as the magnetizing field (H) required to totally demagnetize the magnetic material.
3. $z$ is the condition in which additional increases in the external magnetic field H cannot make the material more magnetic, and the overall magnetic flux density B more or less stabilizes.

Hence option B is the correct answer.