The calculation formula of electric field force is F=qE, and the calculation formula of electric field force can be different according to different situations, as follows:

Calculation of electric field force between 1 and point charge

In the electric field between point charges, the electric field force is directly proportional to the charge and inversely proportional to the square of the distance between charges. The specific formula is: f = kq 1q2/r 2, where k is the charge force constant with the value of 9×109N m2/C2, q 1 and q2 are the charge amounts of two points, and r is the distance between them.

2. Calculation of electric field force in arbitrary electric field

In any electric field, the magnitude of electric field force is equal to the product of charge Q and electric field strength E, and the specific formula is: F=qE, where e is electric field strength and f is electric field force. Electric field intensity e is an important physical quantity to describe electric field effect, and its magnitude is equal to the force of electric field force on unit charge.

3. Calculation of electric field force of multi-point charge

If there are multiple point charges, the total electric field force can be obtained by superposition principle. In the electric field of multiple point charges, each point charge will generate an electric field, which will exert force on other charges.

The sum of these forces is the total electric field force. Therefore, in the electric field with multi-point charges, the formula for calculating the electric field force can be writtEn by the superposition principle: F=qE=q(E 1+E2+...+En), where E 1, E2, ..., en is the electric field intensity generated by each point charge.

The action of electric field force

1, electric field force does work.

The work done by electric field force is equal to the change of electric potential energy. In the electric field, when the electric field force does work on the charge, the electric potential energy of the charge will change. When the electric field force does positive work on the charge, the electric potential energy of the charge will decrease; When the electric field force does negative work on the charge, the potential energy of the charge will increase. Therefore, the work done by electric field force is a measure of the change of electric potential energy.

2. Motion caused by electric field force

Electric field force can cause the motion of charged particles. In the electric field, charged particles will be subjected to the action of electric field force, resulting in acceleration, which will eventually lead to the movement of charged particles. The velocity and acceleration of charged particles are related to the magnitude and direction of electric field force. By analyzing the trajectory and characteristics of charged particles, we can understand the action mode of electric field force.

3. Deformation caused by electric field force

Electric field forces can cause objects to deform. When an object is in an electric field, the electric field force will exert a force on the object and deform it. This deformation can be elastic deformation or plastic deformation. By measuring the deformation degree of the object, we can know the magnitude and direction of the electric field force on the object.