Which of the following ares assorciated with Maxwell ?
a. Displacement current
(b) Unification of the laws of elecriciry and magnestism
(c) Development of Ampere's circuital law
(d) Velocity distribuation of molecues in gas
(e) Modification of Ampere's law

Options

A. a,de
B. a,b,d,e
C. b,c
D. All of these

Answer

To solve the question "Which of the following are associated with Maxwell?" we will analyze each option one by one to determine its association with James Clerk Maxwell.

### Step-by-Step Solution:

1. **Displacement Current**:
- Maxwell introduced the concept of displacement current in 1861. This concept was crucial in modifying the Ampere's circuital law to include situations where electric fields change over time.
- **Conclusion**: This is associated with Maxwell.

2. **Unification of the Laws of Electricity and Magnetism**:
- Maxwell is known for his work that unified electricity and magnetism into a single theory, which is encapsulated in Maxwell's equations. This unification was a significant milestone in physics.
- **Conclusion**: This is associated with Maxwell.

3. **Development of Ampere's Circuital Law**:
- While Maxwell did not originally develop Ampere's circuital law, he modified it by incorporating the concept of displacement current. Thus, he contributed to its development.
- **Conclusion**: This is associated with Maxwell.

4. **Velocity Distribution of Molecules in Gas**:
- Maxwell also contributed to statistical mechanics and is known for deriving the Maxwell-Boltzmann distribution, which describes the velocity distribution of molecules in a gas.
- **Conclusion**: This is associated with Maxwell.

5. **Modification of Ampere's Law**:
- As mentioned earlier, Maxwell modified Ampere's law by adding the displacement current term. This modification was essential for the consistency of electromagnetic theory.
- **Conclusion**: This is associated with Maxwell.

### Final Conclusion:
All the options listed (a, b, c, d, e) are associated with Maxwell. Therefore, the correct answer is that all of these options are correct.