STATEMENT-1 : Hard ferromagnetic materials are used for data storage .
and
STATEMENT-2 : Retentivity of hard ferromagnetic materials is very small .

Options

A. Statement-1 is True , Statement-2 is True , Statement-2 is a correct explanation for Statement-1
B. Statement-1 is True , Statement-2 is True , Statement-2 is NOT a correct explanation for Statement- 1
C. Statement-1 is True , Statement-2 is False
D. Statement-1 is False , Statement-2 is True

Answer

To solve the question, we need to evaluate both statements given in the problem.

### Step 1: Analyze Statement 1
**Statement 1:** Hard ferromagnetic materials are used for data storage.

- Hard ferromagnetic materials have a high retentivity, which means they can retain their magnetization even after the external magnetic field is removed.
- This property makes them suitable for applications like data storage, where the information needs to be retained without a continuous power supply.

**Conclusion for Statement 1:** True.

### Step 2: Analyze Statement 2
**Statement 2:** Retentivity of hard ferromagnetic materials is very small.

- Retentivity refers to the ability of a material to retain magnetization.
- Hard ferromagnetic materials, by definition, have a high retentivity, which allows them to hold onto their magnetic properties for a long time after the external magnetic field is removed.
- Therefore, the assertion that their retentivity is very small is incorrect.

**Conclusion for Statement 2:** False.

### Final Conclusion
- **Statement 1 is true.**
- **Statement 2 is false.**

Thus, the correct option is that Statement 1 is true and Statement 2 is false.

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