What is magnetising intensity?

Explanation

### Step-by-Step Solution:

1. **Understanding the Concept**: Magnetizing intensity is a measure of the strength of the magnetic field applied to a magnetic material. It indicates how effectively the material can be magnetized when subjected to an external magnetic field.

2. **External Magnetic Field**: When a magnetic material is placed in an external magnetic field (denoted as \( B_0 \)), this field interacts with the material, leading to a phenomenon known as magnetization.

3. **Magnetization Process**: The process of magnetization refers to the alignment of magnetic domains within the material due to the influence of the external magnetic field. This alignment results in the material becoming magnetized.

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