Most of the substances show which of the following types of magnetism ?

Options

A. Diamagnetism
B. Paramagnetism
C. Fermomagnetism
D. None of these

Answer

To determine which type of magnetism most substances exhibit, we need to analyze the different types of magnetism: diamagnetism, paramagnetism, and ferromagnetism.

### Step-by-Step Solution:

1. **Understanding Diamagnetism**:
- Diamagnetic substances are characterized by being weakly repelled by a magnetic field.
- The magnetic moment induced in diamagnetic materials is in the opposite direction to the applied magnetic field.
- Examples of diamagnetic substances include water (H2O) and titanium dioxide (TiO2).

2. **Understanding Paramagnetism**:
- Paramagnetic substances are weakly attracted by a magnetic field.
- They have unpaired electrons, which allow them to be magnetized in the same direction as the applied magnetic field.
- However, this magnetism is relatively weak compared to ferromagnetic materials.

3. **Understanding Ferromagnetism**:
- Ferromagnetic substances are strongly attracted by a magnetic field.
- They can retain their magnetic properties even after the external magnetic field is removed, meaning they can be permanently magnetized.
- Common examples of ferromagnetic materials include iron, cobalt, and nickel.

4. **Conclusion**:
- When considering the majority of substances found in nature, ferromagnetism is the most prevalent type of magnetism.
- Therefore, the correct answer to the question is that most substances show ferromagnetism.

### Final Answer:
Most substances show **ferromagnetism**.