# Difference between F=qE and F=q(V*B)

• XuFyaN

#### XuFyaN

what is the difference between these two forces ?

F=qE and F=q(V*B)

The former is the expression for the electric force acting on an object of charge q placed in an electric field of field strength E, while the latter is the expression for the magnetic force acting on an object possessing charge q moving with velocity v in the region of a magnetic field with field strength B.

XuFyaN said:
what is the difference between these two forces ?

F=qE and F=q(V*B)
The first is just a vector relation for a charge in an electric field. The second is the Lorentz force on a moving charged particle in a magnetic field. The latter equation is a vector cross product, meaning that F is perpendicular to both the velocity vector and the magnetic field vector.

Bob S

thanks alot..tomorrow is my exam and i wanted to study about these forces and their differences :)

## What is the difference between F=qE and F=q(V*B)?

The main difference between these two equations is that F=qE represents the force experienced by a charged particle in an electric field, while F=q(V*B) represents the force experienced by a charged particle in a magnetic field.

## What do the variables in F=qE and F=q(V*B) represent?

In both equations, F represents the force experienced by the charged particle. The variable q represents the charge of the particle, E represents the electric field, and V and B represent the velocity and magnetic field, respectively.

## Can these equations be used interchangeably?

No, these equations cannot be used interchangeably. F=qE is used for calculating the force experienced by a charged particle in an electric field, while F=q(V*B) is used for calculating the force experienced by a charged particle in a magnetic field. The two types of fields have different effects on charged particles and therefore require different equations to calculate the force.

## How are electric and magnetic fields related?

Electric and magnetic fields are closely related as they are both components of the electromagnetic force. A changing electric field can induce a magnetic field, and a changing magnetic field can induce an electric field. This phenomenon is known as electromagnetic induction.

## What are some real-life applications of these equations?

These equations are commonly used in various technologies, such as particle accelerators, MRI machines, and electric motors. They help scientists and engineers understand and manipulate the behavior of charged particles in electric and magnetic fields.