Plates Definition and 622 Threads

I am trying to conduct an investigation based on the set up of a set of copper coils with AC ran through them to make them an electromagnet. Held above them inplace is an aluminium plate. I know that the changing magnetic field induces a current in the aluminium plate, which induces a voltage...

Homework Statement You have a summer intern position at a laboratory that uses high speed proton beam. The protons exit the machine at a speed of 2.0*10^6 m/s [...] You decide to slow the protons to an acceptable speed (2.0*10^5 m/s), then let them hit a target. you take two metal plates...

Homework Statement Hey guys. So, I got this problem. According to their hint I'm suppose to calculate the work of moving one of the plates and from their, get to the force. I don't have a clue how to do that. I can't find a single formula that can help with that. Can I please have some...

Here is a problem I made up, in order to try to understand electrostatics of conductors better. Suppose two large square parallel conducting plates, are in space. One has a charge of Q, and another has a charge of -q. They are put close together, from a separation of L, to a separation of l...

Homework Statement Two very large, nonconducting plastic sheets, each 10.0 cm thick, carry uniform charge densities \sigma_{1}, \sigma_{2}, \sigma_{3}, and \sigma_{4} on their surfaces, as shown in the figure . These surface charge densities have the values sigma_{1}= -6.00microC/m^{2}...

Suppose there was a voltage difference between two charged plates, is the electric field constant at all points between these plates?

Homework Statement I have two large parallel plates that are conducting and separated by 10.0cm. The charges on the plates are uniform and equal in magnitude but opposite in sign. The difference in potential between the two is 500 V. The first question concerning this is which plate...

Homework Statement http://img11.imageshack.us/img11/667/efieldmm3.th.jpg Can someone please explain to me why the electric field inside is double of what's the outside based on the picture above? I don't understand what the green and red line is... Homework Equations The...

Calculating the Capacitance of "out of alignment" finite parallel plate capacitors Homework Statement Homework Equations The Attempt at a Solution

Homework Statement Two parallel plates with area A and charges Q and -Q are being pulled apart by force F, so that the distance between, x, slowly increases. Express F in terms of Q, A and x.Homework Equations -\Delta PE=W W=\int Fdx \Delta PE=q_{0}\Delta V Q=C\Delta V...

Homework Statement Hey guys, this is from Purcell 3.19 "Ions are accelerated through a potential difference V_0 and then enter the space between the semicylindrical electrodes A and B. Show that an ion will follow the semicircular path of radius r_0 if the potentials of the outer and inner...

Homework Statement An electron enters the area between two charged plates having a horizontal speed of 1.9E6. The space between plates is 1cm and the electron enters half way down from the top plate. The length of the plates is 2cm. Find the speed of the electron as it exists the space between...

Homework Statement The velocity distribution for laminar flow between parallel plates is given by u/umax = 1-(2y/h)2 where h is the distance separating the plates and the origin is placed midway between the plates. Consider flow of water at 15 0C with maximum speed of umax=0.05 m/s and h=5 mm...

Homework Statement An electron is projected with an initial velocity of 1.6x10^{6} m/s. If the electron just misses the upper plate as it emerges from the field, find the speed of the electron as it emerges from the field? Homework Equations Electric force equation The Attempt...

Casimir force increases when you put 2 plates closer and closer... But where is a limit? Obviously, Casimir calculations will not be valid when distance becomes less then a size of one atom. But I suspect that all these calculations break apart much earlier. Your thoughts?

Homework Statement A proton, accelerated from rest through a potential difference of 1.2 x 10^4 V, is directed at a fixed 5.0 x 10^-6 charge. a) What is the speed of the proton as it leaves the parallel plates? b) What is the distance d from the fixed charge when the proton is stopped...

Homework Statement Hey guys. Where is the force which is created by the electric field, directed to? I think it's towered the bottom plate but I'm not sure. 10x. Homework Equations The Attempt at a Solution

For our Manufacturing class, one of our take-home quizzes is to find out why, as surface roughness continues to decrease (think of very finely polished materials) the static friction between the plates as you try and slide them will increase. Basically, really rough surfaces will be hard to...

Homework Statement Two thin flat plates measure 1m by 1m and are separated by 0.005m. They are oppositely charged with one plate being +15*10^-6 C and the other -15*10^-6 C. Estimate the total forces exerted by one plate on the other Homework Equations F=kq1q2/r^2 \int {\vec E...

How does the thickness of the capacitor plates affect capacitance when the distance between the plates are comparable to the thickness of the individual plates?

Homework Statement In a vacuum diode, electrons are "boiled" off a hot cathode, at potential zero, and accelerated across a gap to the anode , which is held at positive potential V0. The cloud of moving electrons within the gap(called space charge) quickly builds up to the point where it...

Homework Statement An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 5710 V. It then passes between two horizontal plates 6.45 cm long and 1.24 cm apart that have a potential difference of 249 V (see figure below). At what angle q...

Homework Statement The sketch below is a side view of two capacitors consisting of parallel plates in air. The capacitor plates are equal in area but the plate separation differs as shown. Individual capacitors are specified with two letters, for example RS is a single capacitor. The charge on...

This isn't a problem out of my book, just something I noticed while *doing* a problem on parallel capacitor plates. The problem gave me an area for each plate (1 m^2)and a desired capacitance (1 F)and prompted me to find the distance between the plates. C = q/v (capacitance = charge/potential...

I have this as an online assignment and think I have the wrong answer, but the site is telling me the result is wrong and takes a percentage off my grade each time i send a wrong submission. I am just posting an image link because that way you guys can see the picture...

Homework Statement Capacitor plates are length L with radii a,b a<b are co-axial and intially covering each other with line charge density of the inner plate Q/L. determine the force between plates as the inner plate is partially withdrawn along the axis. i) if cylinders charged to...

Homework Statement In a cathode-ray tube (CRT), an electron travels in a vacuum and enters a region between two "deflection" plates which have equal and opposite charges. The dimensions of each plate are 12 cm by 4 cm, and the gap between them is 2.5 mm (not to scale in the diagram). During a...

Homework Statement a certain parrallel plate capacitator has a plate separation d and a potential difference between the plates of V. If the electric field between the plates is uniform a) What is the strength of the electric field F Homework Equations Coloumbs Law F=k(q1q2/d^2)...

If two conductive plates are placed close together separated by a suitable medium to act as a dielectric. It has an amount of capacitance that can accept a charge. ie a capacitor. one plate has an excess of electrons and is negatively charged the other is lacking in electrons being positively...

Homework Statement I have two parallell plates, they are separated a distance of 1 cm. The potential difference is 10kV. A 0.5 cm thick plastic plate lies between the two plates and has a relative permitivitty of 6. Calcualte E and D in the air and in the plastic plate. Homework Equations...

I'm trying to understand electrical potential and have a couple thought questions (Part A and part B) Part A Is it possible to calculate the potential of point between to infinite plates having the same positive charge? I know the electric field is zero between the plates but it would...

Homework Statement The electric field intensity at a point between two large parallel plates is 4.8 x 10^2 N/C. What does the electric field become as a result of each of the following changes, considered separately: a) when the amount of charge on each plate is tripled b) when the...

Homework Statement 1. In the manufacture of commercial license plates, a valid identifier consists of four digits followed by two eltters. Among all possible plate identifiers how many contain only the letters W, X, Y, or Z with a four digit number divisible by 5? 2. All the vertices of...

Homework Statement he electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of a 705 µF capacitor is 320 V. (a) Determine the energy that is used to produce the flash in...

I would like to ask for your help to solve a problem concerning the well-known case of an electron inside a well of defined potential. I've already studied the case of the 1dimensional infinite potential well, but my case is a bit more complicate since it includes a 2D space and different...

I need to calculate the strain energy for a clamped circular plate by the governing equation in polar coordinates.. Load is distributed uniformly over the entire area.. And displacement is in transversal direction to the plate,.. please do help me...

Does anyone know how to calculate the capacitance of two circular plates having different dimensions? Say the top capacitor plate has a diameter d1 and the bottom capacitor plate has a larger diameter d2 and air is in between the bottom and top plate. So, it is not a standard parallel plate...

I just want to know if I'm even given enough information in this question to generate an answer. I don't need an actual answer. Thanks. "An electron is fired from a negative plate towards a hole in a positive plate. It then passes between two parallel plates that are 5 cm long and 3 cm...

[SOLVED] Electric Field Between Two Parallel Plates My textbook says that the magnitude of the electric field at any point between two plates (except near the edges) depends only on the magnitude of the charge on each plate. For example, if the magnitude of the electric field between two...

Homework Statement A small sphere with mass 1.50g hangs by a thread between two parallel vertical plates 5cm apart. THe plates are insulating ahnd have uniform surface charge densities + and - \sigma. The charge on the shpere is q = 8.90 x 10^-6 C. What potential difference between the...

Homework Statement Question: an electron with a velocity of 5.0x10^{}6 m/s is injected into a parallel plate apparatus through a hole in the positive plate. it moves across the vacuum between the plates. what would the potential difference have to be in order to stop the electron 25% of the...

Capacitance= (permitivity x Area of overlap)/ distance between two plates Why is capacitance inversely proportional to the distance between two plates? I understand that C=Q/V. So capacitance is the amount of charge it takes to change the potential difference between the two plates by 1...

Homework Statement An object of mass m carries a charge q and is supsended by a thread between the vertical plates of a parallel plate capacitor. The plate separation is d. If the thread makes an angle \theta with th evertical, what is the potential difference between the plates? Homework...

Homework Statement Two oppositely charged parallel plates, 13.0 cm apart, have a uniform electric field between them. Vb − Va = +25.0 V. An electron with a mass of 9.11 × 10−31 kg and a charge of −1.60 × 10−19 C is released from rest at plate a. Calculate the speed of the electron when it...

[SOLVED] Deflection of Plates Answer choices: A) 63V B) 112V C) 520V D) 642V E) 882V y = .5cm = 5 x 10^-3 m x = 3cm = 3 x 10 ^-2 m angle = 10 degrees acceleration(a) = ((1.602 x 10^-19) (15000))/(9.11 x 10^-31) = 2.6 x 10^15 m/s^2 Force(F) = 2.6 x 10 ^15(9.11 x 10^-31) =...

[SOLVED] Charged parallel plates, proton and electron released simultaneously Homework Statement Two parallel plates 0.700 cm apart are equally and oppositely charged. An electron is released from rest at the surface of the negative plate and simultaneously a proton is released from rest at...

I am having some trouble getting started with this problem. Do I want to use kq/r^2 at all or should I be doing something else? The problem is: Two point charges, Q1=-6.7 microCoulombs and Q2= 1.3 microcoulombs, are located between two oppositely charged plates. (The positively charged...

Homework Statement A parallel plate capacitor with the separation between the plates as 'd' has its lower plate dipped in water. Before dipping, the lower plate has charge Q, while the upper plate has charge 2Q. Let K be the dielectric constant of water. What will be the final charge on the...

I want to write the dielectric profile of the following system, so I can then write its Fourier transform as an integral... The plates are semi-infinite. So far I have: Epsilon, for: -infinity < z <= 0 1, for: 0 < z < ? Epsilon, for: ? <= z < +infinity I need to find the...

Homework Statement Two 10-cm-diameter metal plates are 1.0 cm apart. They are charged to +/-12.5 nC. They are suddenly connected together by a 0.224-mm-diameter copper wire stretched taut from the center of one plate to the center of the other. A)What is the maximum current in the wire...