I see. I understand now. Thank you very much for you help!Geofleur said:Let's look, briefly, at the related concept of the gravitational field. The way you know that there is a gravitational field is if you drop something and it falls (this is assuming that you are not in an accelerating frame of reference). We can define the gravitational field as the force that a mass would "feel", divided by the mass itself.
Similarly, the way you would know if there is an electric field is to release a charged particle and see if it starts accelerating. Of course, you would need to know that it isn't accelerating due to some other force, like gravity. Let's assume that you know how gravity would affect the charged particle, and the particle accelerates in a way different from that. Then you could attribute the different acceleration to an electric field. The electric field is defined as the electric force that a charge would "feel", divided by the charge itself.
The measurement consists of releasing the mass or charge and seeing what force it experiences.
The electric field is a vector quantity that describes the strength and direction of the force exerted on a charged particle at any given point in space.
The electric field is a vector quantity that describes the force per unit charge, while the electric potential is a scalar quantity that describes the potential energy per unit charge. The electric potential is the integral of the electric field, and it is a measure of the work done in moving a charged particle from one point to another in an electric field.
The formula for calculating the electric field is E = F/q, where E is the electric field, F is the force exerted on a charged particle, and q is the charge of the particle. This formula is valid for a point charge, and for more complex systems, the electric field is calculated by summing the individual electric fields of all the charges present.
The electric field is often represented by electric field lines, which are imaginary lines that show the direction and magnitude of the electric field at different points in space. These lines are drawn such that they are always perpendicular to the surface of a charged object and point away from positive charges and towards negative charges.
The electric field exerts a force on charged particles, causing them to accelerate in the direction of the field if they are positive and in the opposite direction if they are negative. The magnitude of the force is directly proportional to the magnitude of the electric field and the charge of the particle. This interaction is the basis for many electrical phenomena, such as static electricity and electric circuits.