Electric Field Due to an Infinite Sheet of Charge and Parallel Plate Capacitor

[@Pomegrante460]

Amazing lectures, watching the entire playlist!

[@PhysicsNinja]

Boom! Thanks

[@user-uf7jh4bz6j]

This is great video! Clear all of my blur concept! Thank you❤

[@i18nGuy]

Doesnt the electric field due to a line charge depend on the distance from the line? Seems like the answer should depend on the height above the sheet.

[@PhysicsNinja]

Good question. In my case it’s just a side view of a plane which look like a line but it’s still a plane characterized with a surface charge density. You are right that for a line the field depends on distance from the wire.

[@lrssmr8548]

Thank you so much for your explanation. It is very clear, however, which I don't understand in the second example (two oppositely charged plate): The total electric field is E1 + E2, with E=sigma/2Eo. BUT isnt sigma of the second electric field negative and so if we did the sum of them, it would equal to zero ? I hope I make myself clear.. I see that we only make the sum of the magnitude.. but I don't understand why we don't respect the polarity of the charge density. Any help would be greatly appreciated :) thank you so much!

[@PhysicsNinja]

Sigma is negative but both field point in the same direction. Fields must be added together as vectors. Field point away from positive charges and towards negative charges

[@Radon.........]

Sir why whole charge on the sheet is not included in cylindrical gaussian figure just a part of sheet , the formula is (total charge enclosed/epsilon)

[@PhysicsNinja]

No its charge enclosed in the surface

[@Radon.........]

@@PhysicsNinja ohh that means the non included sheet in the cylinder has no effect on our required answer?