Plates Definition and 622 Threads

Electric Fields/Gauss's Law: Parallel insulating plates Here's the question: Two large, parallel, insulating plates are charged uniformly with the same charge density σ. What is the magnitude of the resultant electric field E ? The correct answer: zero between the plates, σ/E0 outside My...

A proton is shown to pass between two parallel conducting plates across which a steady potential difference is maintained. Its path curves upwards. An alpha particle enters at the same point with the same velocity as the proton. Add its path to the diagram. Why is it like this. The path is...

Homework Statement Two parallel metallic plates are placed horizontally with a separation of 2.2mm. When the voltage is reduced to zero (so that the plates are neutral), the particle (or sphere) is observed to fall with constant velocity. It is observed to travel 0.85 mm in 8.9s. A new p.d. V...

Homework Statement Hello, I wonder if anyone could check my answer to this problem. Thanks in advance An electron is liberated from the lower of two parallel plates separated by a distance of 5mm. The upper plate has a p.d. of 1000v relative to the lower plate. How long does it it take for...

Homework Statement Would it be possible for someone to check my answer to this past examination question, as I am not sure I'm doing them correctly! Thanks in advance. A negatively charged oil drop, mass 2.4 x 10^–12 kg, is stationary between two horizontal metal plates spaced 1 cm apart...

Homework Statement Electrons, which evaporated from the filament accelerated in homogeneous electric field that was created by using two parallel metal plates, connected to the voltage V = 1 kV. The resulting stream of electrons is deviated from the initial direction for a φ = 15 ° in...

Homework Statement Explain why in the absence of any other charged bodies, the potential will be zero along the centre line between plates Homework Equations - The Attempt at a Solution not sure how to explain it. is this because that the electric field in that region is zero?

Homework Statement - How much is the electrical voltage U between two evenly electrified parallel flat plates, distanced d = 1 cm, if the strength of electric field between them is E = 1 V / m? - What is the strength of electric field to the left and to the right of each plate? - What is...

Homework Statement - How much is the electrical voltage U between two evenly electrified parallel flat plates, distanced d = 1 cm, if the strength of electric field between them is E = 1 V / m? - - What is the strength of electric field to the left and to the right of each plate? - What is...

dear.if the x-component and y-component of velocity is given i.e Vx &Vy.and E (electric field) is also given. then what equation should i use to find acceleration of the electron. i only know about E=F/e(relation of electric field and force) F=ma.if i want to find the "acceleration" if Vx ,Vy...

I have two plates and I want to charge them so they repel each other. To do this I ran opposing currents through the plates and to create magnetic fields which will cause the plates to repel. Now, I need to find the force exerted on each plate. I am having a little trouble with this...

whts the relation of velocity V and electric field E? i only know about E=F/e(relation of electric field E and Force F) any one like to answer?

First year studying Physics at university. I've got my first E&M assignment and it's about charged plates but the thing is, I'm certain we haven't covered most of what it is asking, and I can hardly find any (simple) explanations to what I'm meant to do or methods I'm meant to use. I wasn't...

Why electric field between 2 charged plates is sigma(surface charge density)/(2epsilonO) permitivity of free space?

Homework Statement two metal plates 10mm thin are held a distance 40mm apart with a P.D. 10V across them. +ve plate on left. In between the plates is a vacuum (free space basically). Calculate the charges and electric fields within this system.Homework Equations Q=VC C = εo.A/d No surface area...

Homework Statement "When a block of insulating material such as Lucite is bombarded with high-energy electrons, the electrons penetrate into the material and remain trapped inside. In one particular instance a 0.1 mA beam bombarded an area of 25cm^{2} of Lucite (Class A: \epsilon_r=3.2) for 1...

Homework Statement Two infinite sheets with surface charge density σ1 and σ2, respectively, are oriented perpendicular to the x-axis. An infinite, conducting slab of thickness a is placed between the charged sheets as shown in the figure. The conducting plate has a net charge per unit area of...

Hi everyone, I've been running through past Physics papers, and thought that i'd get you guys to check the answers just to make sure that I've done it correctly. http://img119.imageshack.us/img119/1506/img008v.jpg Question 6: Answer I have is C, using right hand rule for both conductor...

Homework Statement Two infinite grounded parallel conducting planes are separated by a distance d. A point charge q is placed between the planes. Determine the induced surface charge densities as well as the total charges on the two planes. Homework Equations Potential of a point charge...

Thank you in advance for the help! Homework Statement Find the center of mass of a thin plate of constant density (delta) covering the given region. The region bounded by the parabola y= x - x2 and the line y= -x Homework Equations See attachment question 15 p1 The Attempt...

Hey all I read somewhere online that Coulomb's Law only applies to spheres and point charges, and was wondering what formula is used to calculate the force between 2 plates whilst charged the same polarity Also, what is the formula to determine how much voltage is required to maintain a...

Homework Statement Consider two infinite conducting plates of some thickness with charge 2q and -q. The system is in equilibrium, which means there's no charged particles in motion. Find the charge distribution on the surfaces of each plate. (designated as q1 q2 q3 and q4) Homework...

Homework Statement An air filled capacitor consists of two parallel plates, each with an area of 8.39cm^2, separated by a distance of .81mm. A 12.3V potential difference is applied to the plates. Find the capacitance. Answer in units of pF (pico Farad) Homework Equations 1. E = kV/d 2...

Suppose they're separated by a distance d and have thickness D. One has charge Q, the other has charge -Q. Why can we assume that each of the four surface charge densities are constant?

I have a question: I have two plates that form a right angle. How would I go about finding the Capacitance of the two plates?

Homework Statement A liquid-level transducer consists of two parallel plates of conductor immersed in an insulating liquid. When the tank is empty the capacitance of the plates is 200pF. The relative dielectric constant of the liquid is 25. Determine an expression for the capacitance C as a...

Homework Statement An uncharged conducting slab is placed between two infinitesimally thin insulating plates with surface charge densities \sigma_1 and \sigma_2, respectively. Describe what fields are induced in the conducting slab and their magnitudes. Homework Equations None? The...

Homework Statement Two 10 cm x 10cm square plates that are charged with ±12 nC and are 6 mm apart. What is the magnitude of the electric field between the two plates? Homework Equations E={sigma}{epsilon_0} . The Attempt at a Solution I know I have to use this equation but I'm...

Homework Statement An electron is projected with an initial speed v_0 = 2.00×106 {\rm m/s} into the uniform field between the parallel plates in the figure (Intro 1 figure) . Assume that the field between the plates is uniform and directed vertically downward, and that the field outside the...

Homework Statement Homework Equations Ki + Ui = Kf + Uf The Attempt at a Solution I need to find the velocity of the proton when it's 2.3mm's to the right of where it is now. I need to find the acceleration of the proton. I believe that I should use F=ma to do this. The only...

Homework Statement Two charged plates, plate 1 and plate 2, are separated by a distance s. Plate 1 has charge density \sigma_{1} and plate 2 has charge density \sigma_{2}. Assume that the electric field to the left of plate 1 is E_{1}, in between the 2 plates is E_{2}, and to the right of...

A small sphere with mass 2.10 g hangs by a thread between two large parallel vertical plates 5.00 cm apart . The plates are insulating and have uniform surface charge densities + sigma and - sigma . The charge on the sphere is q = 7.70×10−6 C What potential difference between the plates will...

Dear all, I've found in many books forces acting between 2 parallel wires, but not between a magnetic field and a surface. Let's now imagine a conducting plate which is within a magnetic field. Which is the resultant force acting on that panel? Many thanks in advance! Raúl

Hello, I was wondering at high frequencies, does current literally go through the capacitor plates; from one side to the other? Or is it simply due to charges being stored on the plates, that once the polarity of the circuit has changed, the charges on the plate that has been stored from...

Homework Statement An electron travels with speed 4.91×107 m/s between the two parallel charged plates. The plates are separated by s=1.47 cm and are charged by a 203 V battery. What magnetic field strength will allow the electron to pass between the plates without being deflected...

I am studying for a test tomorrow and our prof gave us a practice test and I am confused on how to solve this problem A charged particle is accelerated through a potential of 15,000 volts, after which it passes between two deflecting plates. What voltage must be applied to these plates to...

Homework Statement ABCD are 2 parallel plates,between which a potential difference of 10,000V is maintained.An electron starting from rest,from point P,moves towards a small hole at Q. After emerging from Q,the electron passes through a region independent of any electric fields and then...

Alright before I ask the question I'm going to be pretty blunt, I'm not very good at physics at all. I have a great interest and desire to learn physics but it just isn't very easy for me so explanations are going to have to be pretty detailed and even then I still might not get them...

Homework Statement A capacitor is constructed of interlocking plates as shown in the figure (a cross-sectional view). The separation between adjacent plates is 1.26 mm, and the effective area of one of the adjacent plates is 6.1 cm2...

Homework Statement A ping-pong ball, of mas3E-4kg is hanging from a light thread 1.0m long, between two vertical parallel plates 10cm (0.1m) apart. When the potential difference across the plates is 420 V, the ball comes to equilibrium 1cm (0.01m) to one side of it's original position. What...

Homework Statement The question is at http://dl.getdropbox.com/u/175564/capacitance.JPG Homework Equations Q = CV C = \epsilon_{0} A / d The Attempt at a Solution The right solution is Q^2 / C that is (h). I know that C is proportional to the inverse of the distance between...

Homework Statement A capacitor has a capacitance of 2.5x10-8F. In charging process, electrons are removed from one plate and placed on the other plate. When the potential difference between the plates is 450v, hoow many electrons have been transferred? Homework Equations C=qV The...

hey sorry for the prolific posting but exam's are coming up and I'm just working through past papers. two conducting parallel plates have uniform uniform current densities flowing through them parallel to their surface. Use Ampere's Law to find the magnetic field inside and outside the...

In lecture, my professor showed us something peculiar. 2 parallel plates with equal charges lie close on top of each other. although the electric field in between the plates cancel each other out, the Force on one plate from the other is F = \frac {\sigma^2}_{2 \epsilon} due to...

Homework Statement I've been staring at this last problem for a while now...but i really don't get it. So if someone could explain to me how to do this, that'd be great. Thanks: In Fig. 22-64, a uniform upward electric field E of magnitude 2.00 x 10^3 N/C has been set up between two...

Homework Statement Two optically flat plates of glass are separated at one end by a wire of diameter 0.250 mm; at the other end they touch. Thus, the air gap between the plates has a thickness ranging from 0 to 0.250 mm. The plates are 15.0 cm long and are illuminated from above with light...

Just a bit confused/ need confirmation of what's happening. We shine light at the double slit and see interference patterns. Place two opposite 1/4 waves plate, so that we have which way information, in front of the slits. This causes the pattern to disappear. 1. Under what condition does...

Homework Statement HELP! A charged particle is stationary between two horizontal charged plates. The plates are 2.0 cm apart. The particle has a mass of 4.0X10^-13 kg and a charge of 2.4 X 10^-18 C. Find the potential difference between the plates. Homework Equations V= EPE/q ...

Homework Statement A small electrically charged object is suspended by a thread between the vertical plates of a parallel-plate capacitor. The acceleration of gravity is 9.8 m/s^2. What is the potential difference between the plates? Answer in units of kV. Given: tetha = 14 degrees...

Hi, I'm doing 2D modeling with COMSOL and my design is about a flow (in the x direction) inside a structure passing square objects, so I thought I could model it on the mechanics of flow between parallel plates. Unfortunately, the square objects are of the same height as the structure and...