# Electric field lines

The electric field is something that is generated by an electric charge and affects the space around the electric charge, where the influence of the electric field is only felt by other electrical charges. When another electric charge is in the electric field generated by an electric charge, another electric charge senses the influence of an electric force.

Understanding the electric field above, as described in the article about the electric field, can be realized with the mind but can only be imagined in mind. To visualize an electric field, electrical field lines are presented. Electric field lines are a set of lines drawn around an electric charge to indicate the existence of an electric field. Because it aims to show the presence of an electric field, there is a connection between these lines with an electric field. In other words, the magnitude and direction of the electric field can be explained by drawing electrical field lines.

Following is the relationship between direction and electric field strength with electrical field lines:

First, the direction of the electric field moves away from the positive charge and approaches the negative charge. Thus, the direction of the electric field lines also away from the positive charge and approaches the negative charge.

If the positive charge is adjacent to the negative charge, the electric field lines are drawn out of the positive charge to the negative charge. Conversely, if a positive charge is adjacent to a positive charge, the electric field lines are drawn out of each positive charge and away from each other.

Second, the electric field strength is represented by the distance between the electrical field lines. The closer the distance between the lines of the electric field, the higher the strength of the electric field and the farther the distance between the lines of the electric field, the smaller the electric field strength.

Why is the closer the distance between the lines, the higher the electric field strength? To understand this, look at the following explanation. Suppose a positive charge is at the center of the sphere and the electric field lines spread out in various directions through the surface of the sphere. If the number of electric field lines is N and the surface area of the sphere is 4πr^{2}, then the number of lines per unit area or line density is N / 4πr^{2}. Based on this formula, for the same N, if r gets smaller, the distance between the lines gets closer and if r gets more significant the distance between the lines gets farther away.

The electric field strength formula E = k q / r^{2} also shows that the electric field strength is inversely proportional to the square of the distance. If r is smaller, then the electric field strength gets more prominent, and if r gets more prominent, then the electric field strength gets smaller.

Based on the above review it can be concluded that if r is getting smaller (getting closer to the charge) the electric field strength is getting bigger and the distance between the lines is also getting closer. Conversely, if r gets more prominent (the farther away from the charge), the electric field strength gets smaller and the distance between the lines also farther away.

Third, the number of electric field lines is proportional to the electric field strength. The more electric field lines, the higher the electric field strength. The fewer electrical field lines, the smaller the electric field strength.