Electrostatic fields Definition and 16 Threads

I keep reading the amusing lectures from Feynman on Electrodynamics. In particular in Lecture 5-8 figure 5-10, he argues that touching a charged hollow sphere externally with a litte metal ball will cause the ball to pick up charge from the charged sphere (contrary touching the hollow sphere...

So from Gauss theorem, electric field at any point inside a uniformly charged sphereical shell is zero. Thus there is no electrostatic force on the inner sphere. From what I have learnt, a field is necessary to move charges. But in this case the inner sphere acquires a charge q without any...

I know little about QED, QCD, and whatever the corresponding theory for the weak force is, and of course virtually nothing about the quantized theory of the gravitational force, which mostly doesn’t exist, so the following arguments and questions may be somewhat wrongly based where they refer...

Can an electrostatic field be used to create an oxide layer that has a permanent electric field? For a specific example; an aluminium domed van de graaff generator with no oxide layer. If it is turned on and allowed to contact oxygen, would the oxide layer store a permanent electric field?

1. Homework Statement : Homework Equations :[/B] A conductor is an equipotential surface. The charge density near a conductor is proportional to the electric field. Electric field is the negative gradient of potential and thus electric field is in a direction normal to the surface.The Attempt...

1. Passage of current via coil creates magnetic field (fig a), similarly external magnetic field linked to coil when changed created electric current in the circuit connected ( Faraday's em induction fig b). 2. Charging of capacitor using voltage source creates electric field in the capacitor...

Homework Statement Find the magnitude and direction of net electric field at the center of the square array of charges. Find E_x and E_y The square array of charges http://postimg.org/image/4gf94ymmf/ The Attempt at a Solution [/B] My attempt at drawing in the force vectors...

I realize there have been multiple threads on this and believe me I tried my hardest to find these answers from them and other resources. Questions: 1) Is the van de graaff generator a particle collider? I am under the impression that it is meant to follow up on the Cockroft-Walton accelerator...

I have a question about electrostatic fields! I was given these two equationsE= k [xy xˆ + 2yz yˆ + 3xz zˆ] E= k[y^2 xˆ+ (2xy+ z^2)+ 2yzzˆ] And asked to determine if either could be an electrostatic field, I'm not asking how to solve this problem but I'm not sure what defines an...

Homework Statement A single isolated proton is fixed on a surface. Where must another proton be located in relation to the first in order that the electrostatic force of repulsion would just support its weight? 2)Two identical objects have charges from +6.0*10^-6 and -2.0*10^-6...

Imagine nine vertical and parallel lines drawn side by side. They represent infinite planes of uniform voltage. The first line has 0 V. The 2nd line has 1 V. The 3rd has 2 V and so on, with the 9th line having 8 V. The distance between each line is 1 cm, which is 0.01 meter. There is an...

Homework Statement An atom H has a charge +q (=proton) and -q(=electron). q = 1,6.10^-19. The electron is circeling around the proton at r distance r = 0,53.10^-10m. What is the force as a result of the electrostatic interaction between the proton and electron Homework Equations...

Homework Statement In the region x ≥ 0 there is an electrostatic potential V(x)=xexp(-λx) where λ>0 What is the electrostatic field at x→∞ Homework Equations The Attempt at a Solution My understanding is there is no fields at infinity because there is no electrostatic potential...

Hello i have a problem that i need help with. Two fixed charges 'q' and '4q' are positioned along an axis with a separation d=5cm a) Calculate the forces acting on each charge Attempt - I understand that the the force eqn is F = qE - I also understand that i need to work out the...

Well, say there is an positive particle, and a negative particle. Newton said one is pulling the other, and thus it is pulling back. But we now know both particle actually creating fields, and the fields actually exerting the force on the other particle. so basically, this is not action...

Hi, I'm having a little trouble understanding why the field inside a charged conductor must be zero. I understand that when the charge is put on the conductor, they spread out to the surface such that the surface becomes an equipotential. But why does that mean the field inside must be zero?