# Electric fields and mean free path?

• hobbs125
In summary, an electric field is a region in space where a charged particle experiences a force and is measured in volts per meter (V/m). Electric fields can affect the motion of charged particles, which in turn affects the mean free path, or the average distance a particle can travel between collisions. The mean free path is calculated using the equation λ = 1/(nσ) and is also affected by temperature, pressure, and the nature of the particles involved. The strength of an electric field is affected by the distance between charges, the magnitude of the charges, and the medium through which the field passes, while mean free path is affected by temperature, pressure, composition, and external electric and magnetic fields. Electric fields and mean free path are
hobbs125
Just need someone to tell me if I'm doing this right.

If I have accelerated a particle in which the mean free path is 50nm and I need the collision to be 5eV would this be correct in determining the required electric field strength?

5/.00000005 = 100MV/m

Last edited:

## 1. What is an electric field?

An electric field is a region in space where a charged particle experiences a force. It is created by the presence of electric charges and can be represented by lines of force. The strength of an electric field is measured in volts per meter (V/m).

## 2. What is the relationship between electric fields and mean free path?

Electric fields can affect the motion of charged particles in a material, causing them to accelerate or decelerate. This in turn affects the mean free path, which is the average distance a particle can travel between collisions. In a material with a strong electric field, the mean free path may be shorter due to the increased likelihood of collisions.

## 3. How is the mean free path calculated?

The mean free path is calculated using the equation λ = 1/(nσ), where λ is the mean free path, n is the number density of particles, and σ is the collision cross section. The mean free path is also affected by temperature, pressure, and the nature of the particles involved.

## 4. What factors affect electric fields and mean free path?

The strength of an electric field is affected by the distance between charges, the magnitude of the charges, and the medium through which the field passes. Mean free path is affected by the temperature, pressure, and composition of the material, as well as the presence of external electric and magnetic fields.

## 5. How are electric fields and mean free path used in scientific research?

Electric fields and mean free path are important concepts in fields such as plasma physics, materials science, and atmospheric science. They are used to study the behavior of charged particles in different environments and to understand the properties of materials at a microscopic level. They also have practical applications in technologies such as particle accelerators and semiconductor devices.

• Electromagnetism
Replies
3
Views
476
• Electromagnetism
Replies
7
Views
974
• Electromagnetism
Replies
4
Views
958
• Electromagnetism
Replies
14
Views
1K
• Electromagnetism
Replies
25
Views
1K
• Electromagnetism
Replies
73
Views
3K
• Electromagnetism
Replies
14
Views
1K
• Electromagnetism
Replies
8
Views
791
• Electromagnetism
Replies
1
Views
1K
• Electromagnetism
Replies
1
Views
765