Electric Field 3/19/2014

After our fiesta today, we begin the topic on Electric Fields.  This should explain how charged objects can exert electrical forces on each other at a distance without contract.  Like as if they can "feel" the presence of another and detect its motion with only empty space in between....

We started off with the some same old "ActivePhysics" Java simulations:

Question 1: Explore the electric field

We summarized that our observations about the direction of the electric field produced by Q1 and Q2 being two POSITIVE point charges point away from each other.  Also, at different points in space as the distance between the charges increases, the field's magnitude decreases.

Question 2: Field due to single positive charge

We observed the direction of the electric force exerted by Q1 on Q2 and used the force shown in the simulation to calculate the electric field caused by Q1 at that point as

Question 3: Representing an electric field

Using only one single point charge and its electrical field and the field line, we developed some rules for the way that the electric field is represented:

• The direction of the lines as POSITIVE charges in the electric field points outward and NEGATIVE charges points inward.
• The electric field becomes weaker further away as the separation of the lines increases.  The outward it extends the region, the weaker the magnitude of the field in that region
• The magnitude of the field on a line being straight, showing a linear proportional relationship and also the same relationship to the area of dark region next to the lines.
• We analyzed and saw that the larger the magnitude of the electric field the density of the field lines increases.

Question 4: Uniform Field

The word "uniform" was used in describing the electric field in the middle region between the plates due to the fact that the electric field appears the same throughout that region.

Question 5: Force on a charge in a uniform field

We observed the force appears to spread evenly in magnitude when q is moved directly below its present position so that it is near the bottom plate.  The uniform spacing indicates that charged field is the same near top or bottom.  By moving q down and comparing the force on it when in this new position, the electric field still remains constant, and q the same throughout.

Question 6: Force on a negative charge

After leaving q in the middle half way between the plates, moving q around to different places between the plates, we observe the direction and magnitude of the force and conclude the direction and magnitude of the force depends on the charges +/- therefore it is consistent with

HOCKEY TIME!!!  xD

Practice was a no brainer!!

Difficulty 1 was fairly straight forward.... Simply attract it towards the goal.  Got it with only two Negative Charges.

Difficulty 2 could be a bitch but with a bit of thinking "outside" the box, was able to ace it under one shot with one Negative Charge and one Positive Charge.... (through several loops thou)

Uuuhh~ screetshot says it all.... this is what happens when the Charges are FREE OF CHARGE $$$ lol!!