Explain qualitatively on the basis of a domain picture the irreversibility in the magnetization curve of a ferromagnet.

Explanation

To explain the irreversibility in the magnetization curve of a ferromagnet based on the domain picture, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Ferromagnetism**:
- Ferromagnetic materials consist of small regions called domains, each of which has a net magnetic moment due to the alignment of atomic magnetic moments within that domain. In the absence of an external magnetic field, these domains are randomly oriented, resulting in no net magnetization.

**Hint**: Recall that domains are small regions where magnetic moments are aligned.
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