In this lab, students were presented with a new concept called Electric Flux (E. F.). E. F. is physically defined as the measure of the number of electric field lines that pass through a surface. One thing that must be said is that EF is always perpendicular to the surface that is been study.
This picture represents a prediction that students did of what could be the behavior of a point charge that had been shot and had to pass to an electric field. The prediction was to see where the point charge would go. As the picture shows, the point charge moved to the positive charge, and this movement is described by the moment of Inertia of a particular, which describes how easy or difficult is to a particular move. However, the definition of inertia is that an object tend to remain in constant movement or stopped if there is not external force that change its initial situation.
In this picture, how to point charges would behave if they were placed in the center of an electric field with some E. F. The conclusion was that the electric field produces a force on each charge, making both of them rotated and keeping the distance between them equal. Since this movement is a rotational movement, the mathematical expression to describe it is Torque (represented with the Greek letter tau) which is described as a force that is applied to an 'object' at certain distance from its point of rotation, And must be always perpendicular to its point of rotation.
The first picture are just pure calculations in where students could find a mathematical expression to calculate the word done by a point charge.
The second picture describes how the Flux works on a surface. As explained before, it is always parallel to the surface of the object in study. The video can give us an idea of how this works, even though we do not see the electric field on the Cage.
In this picture, the intention is to demonstrate that accordentely with the angle between the electric field and the an area enclose withing the direction of the flux. Since the flux is related with the function cosine, it can be said that by increasing the angle between the flux and its direction, we will have less electric field or lines inside the imaginary 'circuit' created to calculate what can be asked, such as the Flux.
No comments:
Post a Comment