Which of the following is correct about magnetic monopole?

Options

A. Magnetic monopole exists.
B. Magnetic monopole does not exist.
C. Magnetic monopole has constant value of monopole momentum.
D. The monopole momentum increase due to increase in its distance from the field.

Answer

To determine which statements about magnetic monopoles are correct, we will analyze each statement one by one based on the principles of magnetism.

### Step-by-Step Solution:

1. **Understanding Magnetic Monopoles**:
- A magnetic monopole is a hypothetical particle that is a single magnetic pole, either a North pole or a South pole, without the other. In classical magnetism, every magnet has both a North and a South pole.

**Hint**: Recall that in classical physics, magnets always have two poles.

2. **Analyzing the Existence of Magnetic Monopoles**:
- It is known that magnetic field lines always form closed loops. If a magnetic monopole existed, it would imply that magnetic field lines could start or end at a single point, which contradicts the established behavior of magnetic fields.

**Hint**: Consider the behavior of magnetic field lines in typical magnets.

3. **Evaluating the First Statement**:
- The first statement claims that "Magnetic monopole exists." Based on the analysis, since magnetic field lines cannot start or end at a single point, this statement is **false**.

**Hint**: Think about whether magnetic field lines can terminate at a single point.

4. **Evaluating the Second Statement**:
- The second statement claims that "Magnetic monopole does not exist." Since we have established that magnetic monopoles cannot exist based on the behavior of magnetic fields, this statement is **true**.

**Hint**: Reflect on the implications of the first statement being false.

5. **Evaluating the Third Statement**:
- The third statement claims that "Magnetic monopoles have a constant value of monopole momentum." Since we have already concluded that magnetic monopoles do not exist, this statement is also **false**.

**Hint**: Consider the implications of the existence of a property (monopole momentum) if the entity (monopole) itself does not exist.

6. **Evaluating the Fourth Statement**:
- The fourth statement claims that "The monopole momentum increases due to the increase at its distance from the field." Again, since magnetic monopoles do not exist, this statement is also **false**.

**Hint**: Think about how properties are defined in the context of non-existent entities.

### Summary of Results:
- **First Statement**: False (Magnetic monopoles do not exist)
- **Second Statement**: True (Magnetic monopoles do not exist)
- **Third Statement**: False (Monopole momentum cannot be defined if monopoles do not exist)
- **Fourth Statement**: False (Same reasoning as above)

### Final Conclusion:
The only correct statement about magnetic monopoles is that "Magnetic monopole does not exist."