# Electric Fields Simulartion

https://www.falstad.com/emstatic/index.html Show E lines/rho (rho = charge density). Blue = negative charge Yellow = positive charge Dielectric = insulator   1. double charge a. What are the equipotentials? Topo map analogy. b. What happens to the electric field in between the charges? c. Now add several more charges to one side.  What happens to the field lines?   2. dipole charge   a. What are the equipotentials? Topo map analogy. b. What happens to the electric field in between the charges? c. Now add several more charges to one side.  What happens to the field lines?   3. charge + plane a. How do field lines enter the surface of the conductor? b. What is the electric field inside the conductor? c. Where is the highest charge density. d. Add a positive/negative charge to other side…what happens?   4. Make a “plane” using several charges in a row. a. What happens to the tangential components of the electric field? b. What is the resulting field?   5. conducting planes a. This is a basic capacitor.  What is the electric field inside it? b. What about outside it?   6. grounded cylinder + field a. How do field lines enter? b. Where is all of the charge on the conductor? c. What is the field inside the conductor? d. What is the potential at/in the conductor?   7. charged cylinder a. What is the field inside the insulator? b. Where is the field the strongest? c. How does this relate to Guass’s law?     8. charged hollow cylinder 1 a. What is the field inside the hollow part of the insulator? b. How does this relate to Gauss’ law?   9. conducting box a. Where is all of the charge on the conductor? b. What is the potential in the conductor? c. Where is the charge density highest? d. Where are the field lines closest together?   10. floating hollow cylinder 1 a. What happens on the inside surface of the conductor? b. What about the outside surface of the conductor? c. How do the field lines enter the surface of the conductor? d. What is the electric field inside the conductor itself? e. What is the electric field outside the conductor?   11. floating hollow cylinder 2 a. What is the electric field outside the cylinder? b. How does this relate to Gauss’s law?   12. sharp point a. What happens at the sharp point? b. How does this relate to lightning rods?   13. dielectric cylinder + field a. How do the field lines enter the insulator? b. How do the field lines pass through the insulator? c. Is the field inside the insulator weaker or stronger than it would be in the region if there were no insulator there? d. How do charges move inside the insulator?   14. shielding 1 a. What is the electric field inside the cage? b. How does this relate to a Faraday cage?