Electric Field

 Electric Field

The aim in this lab was to show how electric field works and how it can be applied to human being daily live.

In this picture, students were asked to present some concepts about the electric field by using the ideas or the knowledge they have about gravity. Here are some taking from the picture:

1. the electric field is is caused by a charge of some object, like proton or electron. 
2. the magnitude of the electric field depends on the magnitude of the charge that produces the field. 

Likewise, gravity also affect any object, because every object has mass and is affected by gravity that pulls things and avoid them to 'travel' throughout the planet or 'galaxy'

In this picture the students analyzed the forces produced by one charge into another. And the final thoughts, resuming, was that when q1 is near the q2 the field becomes bigger, and father it is, the electric field creases exponentially.  In fact, by keeping the force constant and make the charge varying, the electric field will increase when the the charge is small, and decrease when the charge is bigger. This can be viewed by using the mathematical formula E=F/Q. E (electric field), F (force), and Q (charge). 

 The first picture represents the relationship between the electric field and the force. Either one E=F/Q or E=kq/(r^2) will give the same answer. Nonetheless, all depend what information is convey on a problem.
The second picture is the continuation of the second picture. The conclusions are that the force experienced by a charge remains the same, but the charge itself change sign. The formula F=qE is connected with this result.

In this picture the intention is to see what happen when two objects with the same charge get near each other. For example, when a circular or spherical object has a negative charge and we pass a charged rod with also a negative charge, the charge on the rounded object will spread equally throughout it, making equal angles between them. Numerically speaking, the electric field depends also on the distance between the fixed point and the object that is charged passes near the fixed point. For example, calculating the electric field from a fixed point to a rod with 10 cm in length, we will find that when we get near the center, the electric field is smaller than the one at the beginning of the rod. As stated previously, and like the force, the electric field also depends on the distance between the two charged objects; bigger the distance smaller the electric field.

This worksheet describes the experience made by students in where by increasing the radius between the charges either one the force and the electric field will vary accordingly with the distance. 

Here is a demonstration in how the electric field can be calculated when the charges are not directly pointing to the fixed charge. To a more accurate calculations, the electric field is calculating using the x-axis and y-axis so the direction and the magnitude of it can be determined easily, and are given in terms of vector notation.