# Magnetic field question

• ursulan
In summary, an antiproton is moving in a combined electric and magnetic field, with a velocity of 500m/s to the right. The magnetic field is 2.5T and is coming into the page, while the electric field is 1000V/m downward. The magnitude of the antiproton's acceleration at this instant can be found using the formula F=ma or F=qvB, resulting in an acceleration of 2.4x10^10m/s^2. Further assistance can be found at the link provided.

## Homework Statement

An antiproton (same properties as a proton except that q=-e) is moving in the combined electric and magnetic fields of the figure

The antiproton is moving to the right with a velocity of 500m/s the magnetic field B=2.5T is coming into the page and E=1000V/m downward.

What is the magnitude of the antiproton's acceleration at this instant?

F=ma, F=qvB

## The Attempt at a Solution

The answer is 2.4x10^10m/s^2. I bascially went ma=qvB which didn't work. I'm not sure why it shows E.

ursulan said:

## Homework Statement

An antiproton (same properties as a proton except that q=-e) is moving in the combined electric and magnetic fields of the figure

The antiproton is moving to the right with a velocity of 500m/s the magnetic field B=2.5T is coming into the page and E=1000V/m downward.

What is the magnitude of the antiproton's acceleration at this instant?

F=ma, F=qvB

## The Attempt at a Solution

The answer is 2.4x10^10m/s^2. I bascially went ma=qvB which didn't work. I'm not sure why it shows E.

Maybe this will help?
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfor.html#c2

## 1. What is a magnetic field?

A magnetic field is an invisible force field that is generated by moving electric charges. It is responsible for the magnetic effects we observe in everyday life, such as the attraction or repulsion of magnets and the behavior of compass needles.

## 2. How is a magnetic field created?

A magnetic field is created when electric charges move. This can happen in a number of ways, such as through the flow of electricity in a wire or the movement of electrons in an atom. Additionally, some materials, known as ferromagnetic materials, have their own internal magnetic fields that can be aligned to create a larger magnetic field.

## 3. What is the unit of measurement for magnetic fields?

The unit of measurement for magnetic fields is the tesla (T), which is named after the inventor and physicist Nikola Tesla. Smaller measurements, such as gauss (G), are also commonly used.

## 4. What are the practical applications of magnetic fields?

Magnetic fields have a wide range of practical applications, including in electric motors, generators, and transformers. They are also used in magnetic resonance imaging (MRI) machines for medical diagnosis, and in magnetic levitation trains for transportation. Magnetic fields are also important for Earth's protection from solar wind and cosmic radiation.

## 5. How can magnetic fields be manipulated?

Magnetic fields can be manipulated using various techniques, such as by changing the strength of the current or the number of loops in an electromagnet. They can also be manipulated by using different materials with different magnetic properties or by changing the orientation of the magnetic fields. Additionally, magnetic fields can be shielded or redirected using certain materials and configurations.