# Magnetic Fields and Particle Movement: How Do Magnets Affect Electrons?

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• gmoney909
In summary, a magnetic field does not directly repel or attract electrons, but rather produces a force that is perpendicular to both the field and the velocity of the electron. This force is known as the Lorentz force or Fleming's Left Hand Rule. When two magnets are placed together with the same polarity, this is called magnetic repulsion. Protons and electrons can pass through this field, which can be used to steer charged particle beams.
gmoney909
I was wondering -- does a magnetic field repel or attract electrons ? Also when you place two magnets together with the same polarity and you feel that pressure - what is this called and can protons or electrons pass through this field -- thanks for the help

gmoney909 said:
does a magnetic field repel or attract electrons ?
Neither. You get a force in the direction perpendicular to both the field and the velocity of the electron. Look up the Lorentz force if you are familiar with cross products of vectors, or Fleming's Left Hand Rule if you aren't.
gmoney909 said:
Also when you place two magnets together with the same polarity and you feel that pressure - what is this called
Magnetic repulsion, usually.
gmoney909 said:
can protons or electrons pass through this field
Sure. Changing magnetic fields is one way to steer an electron (or any other kind of charged particle) beam.

## 1. What is a magnetic field?

A magnetic field is a region in space where a magnetic force can be detected. It is created by moving electric charges or by magnetic materials such as magnets.

## 2. How do magnetic fields affect objects?

Magnetic fields can exert a force on objects that have magnetic properties, such as iron or steel. This force can cause the object to move or align with the direction of the magnetic field.

## 3. How can I measure a magnetic field?

Magnetic fields can be measured using a device called a magnetometer, which detects the strength and direction of the field. There are also apps available for smartphones that can measure magnetic fields.

## 4. How can I create a magnetic field?

A magnetic field can be created by running an electric current through a wire or by using a permanent magnet. The shape and strength of the field can be manipulated by changing the orientation and distance of the magnet or wire.

## 5. What are some real-life applications of magnetic fields?

Magnetic fields have a wide range of applications, including in electric motors, generators, MRI machines, and particle accelerators. They are also used in everyday objects such as credit cards, speakers, and compasses.

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