Question about Drift Velocity in Hall Effect

In summary, drift velocity in Hall Effect is the average speed of free electrons under the influence of an electric and magnetic field. It can be calculated by dividing current density by the product of charge, charge carriers, and conductor area. The relationship between drift velocity and electric field is direct, and temperature can affect it by hindering electron movement. Drift velocity is significant in Hall Effect measurements as it helps determine magnetic field strength and electron behavior.
  • #1
Vishera
72
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upload_2014-9-30_11-18-8.png


So my textbook is explaining the hall effect and the following equation was derived:

∆VH=vd·B·W

But if you look at the diagram, it appears that vd is pointing both ways. So which direction is vd pointing in? Or is this because electrons in the opposite direction is the same thing as holes in the correct direction as per traditional current?
 
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  • #2
Yes, the electrons and holes move in opposite directions.
 

1. What is drift velocity in Hall Effect?

Drift velocity in Hall Effect refers to the average speed at which free electrons move in a conductor under the influence of an electric field and a magnetic field perpendicular to each other.

2. How is drift velocity calculated?

Drift velocity can be calculated by dividing the current density by the product of the charge of an electron, the number of charge carriers per unit volume, and the cross-sectional area of the conductor.

3. What is the relationship between drift velocity and electric field?

The drift velocity is directly proportional to the electric field strength. This means that as the electric field increases, the drift velocity also increases, and vice versa.

4. How does temperature affect drift velocity?

As temperature increases, the atoms in a conductor vibrate more, making it more difficult for electrons to move freely. This results in a decrease in drift velocity.

5. What is the significance of drift velocity in Hall Effect measurements?

Drift velocity is a crucial factor in Hall Effect measurements as it allows for the determination of the magnitude and direction of a magnetic field. It also helps in understanding the behavior of electrons in a conductor under the influence of both electric and magnetic fields.

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