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electric field: in the era before Faraday, the force between two charged particles was interpreted as a direct interaction and instantantanea including bone, an action at a distance where the space between the loads is intervenia.Este same concept was used to explain gravitational and magnetic interactions. At present, these interactions are implemented using the concept of field.
each electric charge changes the characteristics of the surrounding space, communicating certain properties that make up the electric field. the electric field acts as intermediary in the interaction between the two charges.
electric field strength: to determine the properties of electric field is used to positive charges (loads of evidence) to be so small that do not change anything.
electric field intensity is E = F / q0.
A vector is a segment that determines the position of a point over another taken as fixed.
E is a vector in the same direction as the vector F. The magnitude of the vector E is independent of the burden of proof, since the force F is proportional to q 0.
for each point in the field the ratio F / q sub zero is always the same (this is a property of the field).
The electric field is a vector field, because each point associated with a single vector space E.
the electric field created by the electric charge is:
E = F / q 0= kq / r 2
If the electric field is created by a continuous distribution of charges, or by several point charges, the resulting field is the vector sum of the electric fields created by each of the charges. Then, as Fr =F 1+ F 2+...+ F n
E r =F r/ q 0= F 1/ q 0+ F 2/ q 0+...+ F n/ q 0
E r= E 1+ E 2+ E 3+ ... + E n
power lines: Faraday developed a geometric procedure that allows to represent vector fields. That is accomplished by drawing the field lines or lines of force.
- The lines of force are imaginary lines that are drawn in the direction of the force would act on a positive charge, positioned at a point.
- The electric field vector at each point is tangent to the line of force at the point and matches the sense of power lines.
- Where the lines are close together, the field is more intense
- The line of force at each point determines the direction of E, therefore, the force F also.
- The electric field is created by a positively charged sphere point is represented by straight lines with a radial direction and outgoing cargo.
- If the load of the field is negative, the lines of force would be directed towards the load.
- The field lines, which have 2 loads of different signs, starting in the positive charge and continue the negative x