Charges and fields SIM

Introduction

This online exercise is based on the Electric Field PhET Simulation.

There are positive (+) and negative (-) charges in a box. Place one (1) positive charge in the middle of the plane. It generates an electric field, which is visualized with arrows. You can change the visualization style by chacking "Voltage" instead of "Electric Field" in the right upper corner.

Explore the simulation. What happens when you add another (+) source of E-field? What happens when you add another (-) source of E-field?

Electric field as a function of distance Experimental Procedure

Select a location for a source charge. It can be at any point of the plane.
Place a few positive charges in the selected location.
Take one E-Field Sensor (it looks like a yellow or orange dot) and place it at a distance d from the electric field source. Make sure that you marked “Show numbers”.
Use the “tape measure” to find out the distance. Ignore the angle (the bottom number).
Read the value of the electric field for various (random) distances r. The unit is (V/m).
Present your findings in a table (see an example below).
Plot your findings (you can use either Desmos or Excel)
Write a conclusion. What question(s) can you answer analyzing the graph? Refer to a theory (theories in physics are presented in a form of an equation/formula/algebraic expression)

Electric field as a function of the source charge Experimental Procedure

Select a location for a source charge. It can be at any point of the plane.
Place one positive charge in the selected location.
Take one E-Field Sensor and place it at a distance d from the electric field source. Make sure that you marked “Show numbers”.
Use the “tape measure” to find out the distance. Ignore the angle (the bottom number). Notice, that in this part you measure the distance only once. The variable to be investigated is the source of the electric field
Read the value of the electric field for various source charges q.
Present your findings in a table (see an example below).
Plot your findings (you can use either Desmos or Excel). Remember to add the trendline.
Write a conclusion. What question(s) can you answer analyzing the graph? Refer to a theory.

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