Parallel plates Definition and 149 Threads

Homework Statement A uniform electric field exists in the region between two oppositely charged plane parallel plates. A proton is released from rest at the surface of the positively charged plate and strikes the surface of the opposite plate, 1.59cm distant from the first, in a time...

Homework Statement Two oppositely-charged parallel plates are separated by a distance of 0.03m. a. What is the strength of the electric field between the two plates if it takes 2.4x10^-19 J of energy to move an electron from one plate to the other. b. What is the acceleration of that...

Any ideas on how one can make a small gap (~10-50nm) between two parallel plates and maintain a known distance between them. I have two very flat surfaces and I would like to maintain a small gap (known gap) across them. I searched in the literature but I came up with nothing so if you have any...

1. A proton with kinetic energy of 2.1 x 10-17 J is moving into a region of charged parallel plates. The proton will be stopped momentarily in what region (attached diagram)? a) Region K b) Region L c) Region N d) Region M Homework Equations \DeltaEk + \DeltaEp = 0 The Attempt at a Solution...

Homework Statement So I'm confused, if you have parallel plates: +++++++++++++++ ------------------- And there's an electron inside the plate: +++++++++++++++ e- ------------------- Does that mean the voltage of the negative terminal is higher than the positive terminal...

Homework Statement What is the electric field at point A in the unit of σ/ε0? Homework Equations E=σ/2ε The Attempt at a Solution I just want to make sure my thinking behind this is correct. From the center we have +5σ. To find the A what I did is subtract the other two -σ from...

http://books.google.com/books?id=p7WsoU-CfPkC&pg=PA224&lpg=PA224&dq=6.132+fluid+mechanics&source=bl&ots=7q6rcCGewf&sig=EvcrqTJCxqLSPbKrkiztkPS4I6Q&hl=en&sa=X&ei=6vo6UYusIenFyAHHt4GYAQ&ved=0CDoQ6AEwAw#v=onepage&q=6.132%20fluid%20mechanics&f=false Can someone please tell me how they arrived at...

Homework Statement Two parallel plates labelled W (negative) and X (positive) are separated by 5.2 cm. The electric potential between the plates is 150 V. An electron starts from rest at time tw and reaches plate X at time tx. The electron continues through an opening in plate X and reaches...

Homework Statement Two oppositely charged parallel plates are separated by 0.20m and have an electric potentiial difference of 1.2*10^3V across them. Locations I and II are in the region between the plates. Distance between top and bottom plate is 0.20m. \stackrel{}{postive...

Homework Statement An electron traveling 1.3*10^2m/s enters the region between two parallel plates at the distances shown. When it collides with the plates, it has a speed of 1.8*10^3 m/s. What is the electric field between the plates? What is the electrostatic force on the electron? And how...

Homework Statement Draw the field lines between two parallel plates with +3V on one plate and +1V on the therHomework Equations The Attempt at a Solution The answer is (D) for a uniform field between the plates, however when two positive charges are drawn the field lines diverge as in (B)...

Homework Statement 1. A 2*10^-6C charged object is .40m left of an another 2*10^-6C charged object, with a 3*10^-6C charged object .40m to the right of the centre object, creating three charged objects in a line. Calculate the magnitude of the net electric force on the centre charge due to...

Homework Statement An electron beam enters the region between two oppositely charged parallel plates near the negatively charged plate, as shown below. The plates are 0.150m long and are 0.040m apart. There is an electrical potential difference of 60.0V across the two plates which creates an...

Hi guys, this is more of a conceptual question, so I hope you guys can give me a detailed explanation if possible. Homework Statement Find the Electric Field inside a Charged Sphere (charge only on the surface) and between two Parallel Plates (oppositely charged) separated by some distance d...

I am struggling with a problem which involves the calculation of the nonuniform electric field fields between two identical parallel plates in which one of the plates is slightly displaced in lateral direction with respect to the other plate (i.e. they do not overlap perfectly). The gap between...

OK, I was thinking about transformers and mutual induction and then drifted onto displacement current. I then decided to build a simple test apparatus and test for the magnetic field between two parallel plates. using a variety of coil designs to have as much of the windings perpendicular to the...

Plz help-Numerical based on 3 parallel plates -Find the charge problem Q} Three identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q and the rightmost plate a charge -Q and the middle one remains neutral.Find the charge appearing...

Our professor gave us a lecture about sensors tonight, but I'm kind of confused about the principals of capacitive touch screen. As the attached figure shows, when finger touches the screen , capacitance is formed between finger and the ITO bars, but is it true for all the ITO bars? It's...

Homework Statement Two parallel plates are separated by 10.0cm and a potential difference of 500.0V is maintained between them. What is the force on an electron between the plates? Homework Equations The Attempt at a Solution E = F / q = kQ / r2 V = kQ / r = Er = Fr / q F = Vq /...

A proton, mass 1.67 x 10^-27 kg , is projected horizontally midway between two parallel plates that are separated by 0.8 cm , with an electrical field with magnitude 7.2 x 10^5 N/C between the plates. If the plates are 4.70cm long, find the minimum speed of the proton that just misses the lower...

The problem is attached, stuck on part d. Homework Statement Im given a problem with two horizontal and parallel plates 8cm long 3cm away from each other. An electron is moving through them with a velocity V_{0}. It is also given that the voltage across the plates is 20 Volts and the...

Homework Statement A moving proton has 6.4x10^-16 J of kinetic energy. The proton is accelerated by a potential difference of 5000 V between parallel plates. http://members.shaw.ca/barry-barclay/Self-Tests/test09/elecst17.gif The proton emerges from the parallel plates with what...

An electron, initially at rest, is accelerated through a potential difference of 600 V between two parallel plates. The plate on the bottom is @ 0 V. The top plate is 600 V. And the distance between the two is 4.2 x 10^-2 m. Calculate the kinetic energy gained. Alright, so initially I was...

Homework Statement Two parallel sheets of conducting metal are very close to each other (A>>d), they have charges of Q1 and Q2 on them. What is the force between these two plates? Homework Equations Gauss' Law The Attempt at a Solution From what I understand, you can use Gauss'...

I don't understand why the electric field intensity is uniform between parallel plates. No explanation in my textbook... Surely as a charge moves up/down between the plates, parallel to the lines of the field, the electric force that it experiences would change (using Coulomb's law)?

Homework Statement For two metal plates parallel to each other, when voltages was applied to them, there is an electric field in between. I measured the voltage at 12 points (known x,y,z) between them. these 12 points formed a rectangular box (three on each of four lines, which is...

Homework Statement An alpha particle is placed between two horizontal parallel charged plates that are 2.00 cm apart. The potential difference between the plates is 12.0 V. WHAT is the ELECTRIC FORCE acting on the alpha particle? -Mass of alpha particle: 6.65 x 10^-27 kg Homework...

Apologies if this has been answered before. I did search but couldn't find it... Imagine two fixed conducting parallel plates separated by 10cm of air. If an alternating voltage is applied to these at 10MHz an electric field produced between the two plates like a giant capacitor. Given that...

Hello, Is the force experienced by a charge at any point between two charged parallel plates the same? Just a preliminary step to my homework question, Let's say I have two parallel charged plates. (positive on top and negative on bottom with field lines going downwards.). Would all positive...

Homework Statement The problem is: If you have 2 rectangular plates 1cmx10cm each, which means that the area is A=10cm2=10-3m2for each plate; every plate holds a Constant positive charge of Q=+2x10-6C each; these plates are separated by a distance d=1cm=10-2m What is the electrostatic...

Derive the electrostatic potential between two flat plates in electrolyte solution. The surface potential at the plate surfaces is low. I think this problem uses the Poisson equation for electostatic potential, but the one I came up with was wrong. It involves the hyperbolic cos. (cosh)

Homework Statement A proton is released from rest in a uniform electric field of mag. 90000 V/m directed along the positive x axis. the proton undergoes a displacement of .2m in the direction of the electric field. Find the change in electric potential. Homework Equations no idea...

Homework Statement To find the capacitance of parallel plates, I am first finding the E field using gauss. However I don't know what the gaussian surface will be. I don't think it will be a gaussian pillbox as the plates aren't infinite, but will it be a sphere?? On a side note, if I...

Hey you all, I have a practice exam problem which is causing some difficulty for me. Basically I have a fully developed flow through two parallel plates. One plate has a constant heat flux and the other plate is heavily insulated. I have found the velocity profile: U=2*Uinf*(1-r^2/h^2)...

Homework Statement Comment on the electric field lines of a pair of finite parallel plates (a) between the plates and (b) near the edges of the plates. Homework Equations The Attempt at a Solution

Why do the field lines bulge out at the ends of plates with finite lengths? I understand why the field is uniform between infinitely long plates but cannot extend the concept to plates with fixed length:( I know they have to bulge but why not bulge inwards rather than outwards?

Hey, I've recently been studying electric fields, and our teacher told us that the field is approximately uniform between two charged parallel plates, ie the force acting on a unit charge is equal everywhere. This doesn't seem to tie with everything else we've been taught; surely, as you...

Homework Statement [PLAIN]http://img214.imageshack.us/img214/6328/physics2.jpg An electron enters the lower left side of a parallel plate capacitor and exists precisely at the upper right side (just clearing the the upper plate). The initial velocity of the electron is 7x10^6 m/s parallel to...

Hi, I was wondering if someone could help me understand how the potential of a parallel plate capacitor can be altered. I understand that the potential difference across two plates is equal to the potential of the battery that charges them, but can this potential be altered by changing the plate...

Homework Statement 5. Two large, parallel conducting plates carrying opposite charges of equal magnitude are separated by 2.20 cm. a) If the surface charge density for each plate has a magnitude of 47.0 nCm^-2, what is the magnitude of the electric field intensity in the region between the...

Homework Statement An electron starts from one plate of a charged closely spaced (vertical) parallel plate arrangement with a velocity of 1.63x104 m/s to the right. Its speed on reaching the other plate, 2.10 cm away, is 4.15x104 m/s. ... If the plates are square with an edge length of 25.4...

Upon calculating the electric field for a plate of charge, you arrive at: E = Q/Ae (Q the charge on the plate, A the area of the plate, e the permittivity of the dielectic) But then, isn't the total electric field between the plates twice this because of the equal but opposite charge on the...

Homework Statement Two very large parallel plates are oppositely and uniformly charged. The field between the plates is 1.3×10^6 N/C. How dense is the charge on each plate ( in microC / m^2 ) Homework Equations The Attempt at a Solution

Homework Statement A flat circular disc of radius 1.0m is rotated at an angular velocity of 0.65 rad/sec over a fixed flat surface. An oil film separates the disk and the surface. If the viscosity of the oil is 16 times that of water (20 degree C) and the space between the disk and the fixed...

Two parallel metal plates are separated by 1.5 cm and are maintained at a potential difference of 1200 V. A proton, initially at rest, is released from the poisitive plate. When it reaches the negative plate its speed is : So i know that potential energy is Vq. So i went 1200 V x 1.602 x...

"the sum of the force from the top plate and the force from the bottom plate always equals the same amount"...as shown here: http://www.regentsprep.org/Regents/physics/phys03/aparplate/ I mean, if a charge was placed at different places (ie distances) between 2 point charges, the net force...

Hey asume i have conected up parallel plates but of different areas with a given potential difference ie battery, what hapens 2 the plates actualy i expect a uniform field, but how can we obtain that since we would require same potential on each plate! and secondly i expect both plates to...

I'm not sure if this qualifies as a 'homework question'. There is no specific problem...I have a question about something in the text. I posted in 'Classical physics' with no luck. Maybe someone can help me here? It gives the situation of a conducting plate with charge density sigma 1 on...

I'm not sure if this qualifies as a 'homework question'. There is no specific problem...I have a question about something in the text. It gives the situation of a conducting plate with charge density sigma 1 on each side. The E field on each side due to the conducting plate is = sigma...

Homework Statement A pair of oppositely charged, parallel plates are separated by a distance of 5.0 cm with a potential difference of 500 V between the plates. A proton is released from rest at the positive plate, and at the same time an electron is released at the negative plate. Neglect any...