Magnetostatic screening or shielding can be created by

Options

A. Super conductor
B. Soft iron ring
C. Both (1) & (2)
D. Neither (1) nor (2)

Answer

To determine whether magnetostatic screening or shielding can be created by superconductors, soft iron rings, both, or neither, we can analyze the properties of these materials in the context of magnetism.

### Step-by-Step Solution:

1. **Understanding Magnetostatic Screening/Shielding**:
- Magnetostatic screening or shielding refers to the phenomenon where a material can protect a region from external magnetic fields. This is achieved by the material's ability to redirect or absorb magnetic field lines.

2. **Properties of Superconductors**:
- Superconductors are materials that exhibit zero electrical resistance and expel magnetic fields when cooled below a certain critical temperature. This phenomenon is known as the Meissner effect. As a result, superconductors can effectively shield regions from external magnetic fields.

3. **Properties of Soft Iron**:
- Soft iron is a ferromagnetic material that can be easily magnetized and demagnetized. When placed in a magnetic field, soft iron becomes magnetized and can channel magnetic field lines through itself, effectively creating a region with reduced or no magnetic field inside it.

4. **Comparison of Both Materials**:
- Both superconductors and soft iron can create magnetostatic shielding. Superconductors do this by expelling magnetic fields entirely, while soft iron does this by allowing magnetic field lines to pass through it, thus protecting the area inside from external magnetic influences.

5. **Conclusion**:
- Since both superconductors and soft iron can create magnetostatic screening or shielding, the correct answer to the question is that magnetostatic screening or shielding can be created by both superconductors and soft iron rings.

### Final Answer:
Magnetostatic screening or shielding can be created by both superconductors and soft iron rings.

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