Plates Definition and 622 Threads

My teacher marked my answers to this assignment as wrong. He wouldn't explain why, so I hope you guys will be kind enough to point me in the right way :smile: The reading of the sensitive ammeter was found to be 0.002mA. Radon-220 isotopes are introduced through the valve and it releases...

two parallel plates of area A is separated by a distance d. One plate has positive charge distribution with area chrage density \sigma and the other plate has an area charge density -\sigma how much work does it take to move the plates 2d? W=Fd=QEd' i'm not sure what to use for the Q or the...

A dielectric is inserted between the plates of a capacitor. The system is charged and the dielectric is removed. The electrostatic energy stored in the capacitor is 1. greater than 2. the same as 3. smaller than it would have been if the dielectric were left in place. U= 1/2 (K)EAd E^2 K=...

i have a project of making electric stove for that top portion a plate like cover for transfering heat over 500degree and nonconductive material in thin of 2mm and dia over 160mm the material whatever may be with good surface.This is good product for cooking with low cosuption of power, for ten...

No numbers here - purely conceptual. Two thin plates carry total surface charge densities of \sigma and \sigma_{1} respectively. An uncharged conducting slab is placed in between the charged plates, and then above \sigma. What are the induced charged densities on the surfaces of the...

No numbers here - purely conceptual. Two thin plates carry total surface charge densities of \sigma and \sigma_{1} respectively. An uncharged conducting slab is placed in between the charged plates, and then outside \sigma. What are the induced charged densities on the surfaces of the...

which statements are true for two oppositely charged, isolated parallel plates: C=capacitance, U=stored energy, (Q and -Q =charged on the plates). Note: isolated plates can not lose their charge. a. when the distance is doubled, U increase. b. inserting a dielectric increases Q c. when...

Homework Statement An electron starts from one plate of a charged closely spaced (vertical) parallel plate arrangement with a velocity of 1.63 x 10^4 m/s to the right. Its speed on reaching the other plate, 2.10 cm away is 4.15x10^4 m/s I got parts a and b - part C is what I'm having...

Hello. I can't understand that why electric field lines are radial between two parallal plates but curved at the end.? what is the reason.

hi, We see theoretical discussion of Electric field inside the charged capacitor is confined in the space between the plates and E.d = potential difference between plates. Considering the battery terminal(let us say positive terminal), wire and left plate or top plate, being in the same...

1.Two plates placed a distance "D" apart. One charged +Q, the other -Q. An uncharged slab of metal is placed between the plates. 2. Does this slab change the electric field outside or between the plates (but outside the slab)? Do forces exerted on particle sitting between the plates (but...

1. The magnitude of the electric field between two plates of a parallel plate capicitor is 4.7 x 10^4 N/C, if the charge on each plate increases by a a factor of 3, what happens to the electric field? increase by a factor of 3 or 9? decrease by a factor of 3 or 9? not effected? 2...

I heard that two flat conducting parallel plates have the property that electric field at any point between them, is uniform, and of constant magnitude. I was wondering how this was possible. For example, a test charge closer to the positive plate conpared with a test charge closer to the...

A point charge q = −2.40 nC is initially at rest adjacent to the negative plate of a capacitor. The charge per unit area on the plates is 4.50 µC/m2 and the space between the plates is 6.50 mm. (a) What is the potential difference between the plates? kV (b) What is the kinetic energy of...

Hey guys, I not similar to autocad at all and you know now its really difficult to me. I can even draw these stuff. If some one can help me out with these sample plates I will be so glad. *Complete the top view on the space provided: http://rapidshare.com/files/29181074/152222.dwg.html*draw...

Homework Statement http://aycu16.webshots.com/image/13135/2004772066267823450_rs.jpg The mass of the ball is 40 milligrams, the applied potential difference is 480 V and the plate separation is 6 cm. If the string hangs at an angle of 20deg to the vertical, determine the charge on the...

Question Two glass plates 10.0 cm long are in contact at one end and separated at the other end by a thread 0.0500 mm in diameter. Light containing the two wavelengths 400 nm and 600 nm is incident perpendicularly. At what distance from the contact point is the next dark fringe? Relevant...

I just am trying come up with a hypothesis regarding the plates in a CRT system? How do they become charged? Looking at when an electron travels between the two plates, say the plates are on the top and bottom and the top plate is positively charged and the bottom is negatively charged, we...

Would plates that are not marked "microwave safe" explode in a microwave oven or crack slowly?

Hi, I'm in the process of completing my physics coursework (A-level) and have run into a bit of a problem: I am trying to find a general equation for a plate capacitor, where the plates aren't parallel. I've always seen the parallel plate capacitor equation: C = \frac {\epsilon A}{d}...

Homework Statement The electrostatic potential energy of a system of point charges q1 = 1 µC, q2 = 2 µC, and q3 = 3 µC at the corners of an equilateral triangle whose side s = 30 cm is a. 1.10 J b. 0.990 J c. 0.631 J d. 0.330 J e. 0.123 J Homework Equations See...

Homework Statement A small sphere with mass 2.90 g hangs by a thread between two large parallel vertical plates 0.05 m apart. The plates are insulating and have uniform surface charge densities + \sigma and - \sigma . The charge on the sphere is q = 9.70×10^6 C. What potential difference...

Homework Statement An infinite plane of charge with surface charge density sigma = 8.00 nC/m^2 lies in the yz plane at the origin, and a second infinite plane of charge with surface charge density sigma = -8.00 nC/m^2 lies in a plane parallel to the yz plane at x = 4.00 m. The electric field...

Homework Statement A sphere of radius 8.0 cm carries a uniform volume charge density rho = 500*10^-9 C/m^3. What is the electric field at r = 3.0 cm? a.36.0 N/C b.230 N/C c.140 N/C d.565 N/C e.450 N/C Homework Equations E = (k*Q*r)/(R^3), where...

helo :smile: have a proble here can someone help me out? supouse i know the surface of the plates of a capacitor ( that are flat surfaces place one in front of anougthere ) the distance bethwin them and the charge. how do i calculate the force that apears betwin them?

I'm writing a report about using numerical techniques to solve a simple parallel plates capacitor problem. Would it be proper to say that there is no closed form solution to Lapalces equation when dealing with fringing effects? Isn't this the reason why we use numerical techniques to solve...

Hello, Quick question. If you have a parallel plate capacitor charged with X volts. Is there a detectable E field outside the plates at all or only between the plates? Thanks, Jason O

I'm not sure where to post this. It's for an engineering class, but it's more a question about the math. I'm following an example along in my book, and I just need a little help understanding it: (Q) There are two plates of a parallel-plate capacitor that are separated by a distance d and...

Hi, Why does C=Eo*Er*(A/d) only work for a parallel plate geometry? Which part of it dictates its exclusivity to a parallel geomtery? Why can't I make the plate separation, d the distance between two adjacent (coplanar) plates and it give me the capacitance of that geometry? Any links...

Hi, Does anyone know an equation/approximation/model or other to estimate the capacitance between two coplanar (adjacent) plates? I know that for parallel plates: C = E0*Er*(A/d). I also know that the capacitance decrease as the plates move from a parallel to a coplanar geometry as the...

Two infinite conducting plates 1 and 2 are separated by a distance l. A point charge q is located between the plates at a distance x from plate 1. Find the charges induced on each plate. I solved this problem assuming (intuitively) that a potential difference between plate 1 and 2 equals 0 and...

Hello, I am interested if ANYONE can point a mistake in my reasoning... I am constantly getting a result that is 2X greater than the textbook derivation. The problem is this: We have 2 CONDUCTING, infinitely large, oppositely charged plates (far away), each with a charge distribution of...

obvious question IMO, but just need to make sure before test. if you have two parallel conducting plates, and apply charge to one of them, then the field between them is half, compared to if the plates were acting as an air capacitor ie. both plates oppositely charged? thing is, when I use...

Am I overthinking this problem? A 15uF capacitor is connected ot a 55V battery and becomes fully charged. The battery is removed and the circuit is left open. A slab of dielectric material is inserted to completely fill the space between the plates. It has a dielectric constant of 4.8...

there's something about these PDE:s that I don't understand, can't find out how it really works. Here comes a problem that we can discuss. 2 equal 0.2m think iron plates got the temperatures 100 and 0 degree C from the beginning. At the time t = 0 are these 2 plates laid next to each other...

Can anyone help me with a hint of some sort? I am lost... A small sphere with mass 1.50 g hangs by a thread between two parallel vertical plates 5.00 cm apart. The plates are insulating and have uniform surface charge densities + and -. The charge on the sphere is q = 8.90 10-6 C. What...

The problem says that there are two parallel plates having charges of equal magnitude but opposite signs and they are separated by 16cm. Each plate has a surface charge of 31 nc/m2(sorry don't know how to superscript). I need to find the potential difference between the plates. I thought I...

Hey guys. I'm having trouble analyzing a part of this problem. Two conducting, infinite sheets of charge (with thickness a) are fixed perpendicular to the x-axis as shown. The sheet from x = -2a cm to x = -a has a net charge per unit area -s and the sheet from x = +a to x = +2a has a net...

I have a positive and a negative charged plate running parallel to one another. To find the Electric Field to the left of the plates, I say: E dot dA = Qenclosed / permittivity Then E times 2pi(r) = Qenclosed / Permittivity then E = Qenclosed / 2pi(r) x Permittivity and since Qenclosed...

I need help on a few questions. 1.An alpha particle has a positive charge of 2e and a mass of 6.6 x 10^-27 kg. With what velocity would the particle reach the negative plate of a parallel plate apparatus with a potential difference of 2.0 x 10^3 V. a)if it started from rest at the positive...

Hello all.. Here's a question I need some help with... A point charge +Q has been placed between two infinitely large conducting plates. The charge induced on the surface of the first plate is q_{1}. What should be the charge induced on the surface of the second? (Diagram attached; the...

I am taking a course in Electro-Optics for Electrical Engineering and I am having some problem solving the following question. Take two ideal polarizers (the first with its axis vertical and the second, horizontal) and insert between them a stack of 10 half-wave plates, the first with its...

How does one prove that the force between two conductor plates is F=q^2/2eA, where e=epsilon. If I use F=qE. Where the electric field is generated by one of the conducting plates: E=q/eA, then F=q^2/eA. I think what the answer assumes is that the E-field is from a uniform plate...

How much are graphite plates? I need them to build my fuel cell.

I'm trying to calculate the capacitance across a couple of parallel plates but, for fun, one of the plates looks like a stair step. So it has 2 sections facing one normal parallel plate at different distances. I see two possibilities here, one being that I can simply treat the two sections as...

So I've got this velocity distribution for laminar flow between parallel plates. \frac{u}{u_{max}} = 1 - (\frac{2y}{h})^2 h is the distance between the plates with the origin placed midway between the plates. I'm assuming this is for water flowing at 15 deg C with u_{max} = 0.10 m/s and h...

Take two charged, moderately thick conducting plates. Suppose one has a charge +Q and the other -Q. Arrange the plates facing each other as in a capacitor. So why don't the outer surfaces of the plates have any charge? (The charge +Q, for instance, is wholly on the inner surface, the surface...

I am curious as to your thoughts about people who post stickers on the back of their cars or change the license plate frame to announce to the world where they went to college. In some cases you can learn much of a stangers background as they have two or three and one specifies mba or JD or...

Hi, I generally understand interference and Newton's ring/Young's double slit experiments, but I can't find the answer to a pretty simple question: When two glass plates are placed together and their is a gap of thickness "t", contructive and destructive interference leads to interference...

Two plates, potential difference V =1500 which are .012m apart. What speed particle can pass through them without being deflected?