Parallel plate Definition and 275 Threads

A parallel-plate fluid flow chamber is a benchtop (in vitro) model that simulates fluid shear stresses on various cell types exposed to dynamic fluid flow in their natural, physiological environment. The metabolic response of cells in vitro is associated with the wall shear stress.
A typical parallel-plate flow chamber consists of a polycarbonate distributor, a silicon gasket, and a glass coverslip. The distributor, forming one side of the parallel-plate flow chamber, includes inlet port, outlet port, and a vacuum slot. The thickness of the gasket determines the height of the flow path. The glass coverslip forms another side of the parallel-plate flow chamber and can be coated with extracellular matrix (ECM) proteins, vascular cells, or biomaterials of interest. A vacuum forms a seal to hold these three parts and ensures a uniform channel height.Typically, the fluid enters one side of the chamber and leaves from an opposite side. The upper plate is usually transparent while the bottom is a prepared surface on which the cells have been cultured for a predetermined period. Cell behavior is viewed with either transmitted or reflective light microscope.

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  1. G

    Electric field between parallel plate capacitor

    If you have an infinite non-conducting plate, the electric field just outside is equal to sigma / 2*epsilon. The electric field just outside a conductor is equal to sigma / epsilon. I understand both these results, but why is it than in the formula for the capacitance of a parallel plate...
  2. B

    Calculate capacitance of a parallel plate but of made up of two media

    Homework Statement Calculate capacitance of a parallel plate but of made up o two media!? The parallel plate capacitor in the figure below is quarter-filled with mica (εr=6). Its remaining ¾ part is filled with air. The total area of the capacitor is 10 cm2 and the distance separating the...
  3. B

    Calculate capacitance of a parallel plate but of made up o two media?

    Calculate capacitance of a parallel plate but of made up o two media!? The parallel plate capacitor in the figure below is quarter-filled with mica (εr=6). Its remaining ¾ part is filled with air. The total area of the capacitor is 10 cm2 and the distance separating the plates is 2mm. Find the...
  4. C

    Questions about parallel plate size

    Questions about parallel plate size... Hi everyone, new member here and I apologize in advance if my questions seem somewhat amateur. Recently I've started learning about capacitors, electrostatics and electric theory in general. I guess I'm having trouble trying to wrap my head around the...
  5. B

    Parallel Plate Conductor Question

    Homework Statement There are 2 parallel plates of unknown area. The area between the 2 plates is completely filled with 150 kg of water. The capacitance is .3 mirofaradays. K of water is 120 and had density of 1000 kg/m^3. Also Eo = 9.1 x 10^-12 C^2/(NxM^2). Determine the distance between...
  6. F

    Electric field in parallel plate capacitor

    Homework Statement The parameters of an air-filled parallel plate capacitor are: d = 5mm and A = 500cm2. The charge of the electrodes are Q = 10nC and −Q. Inside of the capacitor in the middle point there is a point charge of 0, 02Q. Find the magnitude of the force acting to the point charge...
  7. B

    Initial speed of proton between parallel plate=?

    Homework Statement So I just wrote my midterm in physics, and I was curious on how to do the last question. Parallel plates, length 5.5cm, Distance between them is 0.3 cm Electric Field (E) is 5.4x10^4 Asking what is the initial speed of a proton going through the parallel plates if it just...
  8. U

    E-B crossed fields parallel plate

    Homework Statement A parallel plate has p.d. V with one end 0V and the other +V. B-field of strength B has direction along plates. An electron is released from rest at 0V plate. Show that if V is less than e(DB)2/(2m) the electron will not reach the other plate. Homework Equations...
  9. fluidistic

    Capacitance of a parallel plate capacitor with dielectrics

    Homework Statement I'm asked to find 1)The capacitance 2)The electric field 3)The surface charge density 4)The polarization charge at the interface between the dielectrics. Of 2 set ups. The first one is a parallel plate capacitor which is half filled with a dielectric ##\varepsilon _1## and...
  10. B

    What is the total charge stored by parallel plate capacitors?

    Hello, I am currently reading about what has been alluded to in the title of this thread. I attached a diagram, as it will be of some help. Okay, in my textbook it says: After the battery is attached to the circuit, the capacitors quickly reach their maximum charge. Let’s call the maximum...
  11. U

    Capacitance and E-field of a parallel plate capacitor

    Homework Statement The Attempt at a Solution I know that the E-field is definitely affected by the presence of the space charges. Since one side is positive, the positive charges in the air get pushed towards the negative plate. so Enet = Eplate - Echarges But the thing is...
  12. A

    Parallel plate - uniform electric field help

    Homework Statement A parallel-plate uniform electric field with a strength of 325 N/C is oriented as shown below. An electron (q = 1.6 × 10-19 C, m = 9.11 × 10-31 kg) is released (from rest) inside the field and moves 3.2 cm to the left. What is the final speed of the electron at the end of...
  13. S

    Electrostatic force on a parallel plate

    I'm tasked to find the force one parallel plate exert on the other plate in a capacitor. somehow the force isn't just F=qE, where E=Q/2εA What am I missing here?
  14. 0

    (Very Basic) Movement of Charged Particles Through Parallel Plate Apparatus

    Homework Statement What is the electric potential two-fifths of the way through a parallel-plate apparatus (from the positive plate) if the plates have a total separation of 5cm and field strength of 5000N/C.Homework Equations Difference Potential Energy = Electric Field Strength x Distance V =...
  15. T

    Role of ground in charging a parallel plate capacitor

    I am new with the topic Capacitors .I have read that a capacitor can be charged in two ways .One using the battery which I understand .The other is by charging one plate and grounding the other plate .I am not able to understand how this is done . Suppose +q charge is given to a plate ,say...
  16. T

    Parallel Plate Capacitor having equal charges on plates

    Homework Statement Q .1 The plates of a parallel plate capacitor are given equal positive charges. What will be the potential difference between the plates? What will be the charges on the facing surfaces and on the outer surfaces? Q.2 Each plate of a parallel plate capacitor has a...
  17. Seydlitz

    Potential Energy of an electron in a parallel plate capacitor

    Homework Statement What is the potential energy of an electron in a parallel plate capacitor if kept on the negative plate before being released? Homework Equations 1/2mv^2 = qV = PE Capacitor Energy = 1/2QV The Attempt at a Solution 1/2mv^2 = qV = PE However if I'm not mistaken there's...
  18. Gh778

    Faraday cage in a parallel plate capacitor

    Hi, A parallel plate capacitor is charged from fixed voltage, after I cut voltage source. Now, what's happened if I place a Faraday cage inside capacitor (without touch capacitor) ? Capacity changed ? So energy of capacitor changed ?
  19. R

    Dielectric and Parallel Plate Capacitor, the point?

    Hi, so I'm having a little trouble understanding why... you would put a dielectric in between a parallel plate capacitor? I know it increases the capacitance but it does so by lowering the potential difference sooo... The charge is still the same, I believe the potential energy also decreases as...
  20. J

    Parallel Plate Super-Capacitor

    Just throwing this idea out there and wondering if there is any reason it would not work. In a parallel plate capacitor, the maximum voltage is controlled by the dielectric strength and the thickness of the dielectric. When using vacuum as a dielectric, there is a voltage dependant leakage...
  21. B

    Voltage, capacitance and EM energy of a parallel plate capacitor

    Homework Statement This is an EM waves class, but we are given the following problem, which seems deceptively simple. I'd like some feedback to see if this is done correctly. Homework Equations Consider a parallel plate capacitor connected with a resistor with resistance R, as shown in the...
  22. tomwilliam2

    Charge on a parallel plate capacitor

    Homework Statement If a parallel plate capacitor is charged with charge Q and -Q on its plates, respectively, and then isolated, then we place a dielectric into the space between the plates, does the charge on the plates decrease, or stay the same.Homework Equations U=(QV)/2The Attempt at a...
  23. P

    How to determine the surface charge density for a parallel plate capacitor

    Homework Statement The problem statement is given in the figure below Homework Equations E=σ/(2* ε) The Attempt at a Solution The top plate is assumed to be negative charge. The bottom plate is assumed to be positive charge. Since negative charge pulls and positive charge pushes...
  24. A

    Electric field at point inside a parallel plate capacitor

    This doubt is nagging in my mind for couple of days,and its makes the rest of the things so dizzy and confusing.Heres what i thought- What is the electric field at a point inside a parallel plate capacitor? I thought of this-When i place a guassian surface of ,well maybe any...
  25. C

    Changes in Capacitance During Discharge of Parallel Plate Capacitor

    Homework Statement I've been studying the changes in capacitance (presumably due to fringe capacitance) as a parallel plate capacitor discharges. The data is entirely as I would expect, excluding the last few data points, which were taken at voltages less than two mV. The capacitance shows...
  26. N

    Force on dielectric in parallel plate capicitor

    Force act on dielectric slab on inserting between the parallel plate = [8.85 * 10^-12]b(k-1)(V^2)/2d where b = width of the plate , d = distance b/w the plates , V is the constant potential difference across the plates and k = dielectric constant Which force is acting on dielectric...
  27. W

    Conceptual Question on Parallel Plate Capacitors

    Homework Statement Two capacitors, C1 and C2, are separately charged to 166 C and 348 C, respectively. They are then attached in parallel so that the + plate of one goes to the - plate of the other, and vice versa, as shown on the diagram below (notice how C2 was rotated 180 degrees before...
  28. T

    Electromagnetics - parallel plate capacitor energy storage

    Electromagnetics -- parallel plate capacitor energy storage Homework Statement A parallel-plate capacitor 0.5m by 1.0m has a separation distance of 2cm and a voltage difference of 10V. Find the stored energy, assuming that ε=εo. If a 200-volt potential is applied in the capacitor, (a)...
  29. N

    Parallel plate conductors question

    Homework Statement "An electron is fired from a negative plate towards a hole in a positive plate. It then passes between two parallel plates that are 3 cm long and 2 cm apart with a voltage of 550 volts across them. If the accelerating voltage across the two original plates is 900 volts what...
  30. N

    Pith ball and parallel plate capacitor prolem

    Homework Statement A 10 gram pith ball having a charge of 1μC is electrostatically attracted to one of the inside surfaces of a large parallel plate capacitor by an electric field between the plates. The plates are vertically oriented so that the electric field between the plates is...
  31. S

    Parallel plate capacitor by an electric field between the plates

    Homework Statement A 10 gram pith ball having a charge of 1μC is electrostatically attracted to one of the inside surfaces of a large parallel plate capacitor by an electric field between the plates. The plates are vertically oriented so that the electric field between the plates is...
  32. E

    Parallel plate waveguide, step discontinuity

    Hello! You can find in the picture attached a parallel plate waveguide which has an a1 height before the step and an a2 height after the step. The plates are perfect conductors and the step is ideal. I can't determine which physical quantities are continuous across this discontinuity. Suppose...
  33. A

    Field of the parallel plate capacitor

    Homework Statement A vacuum parallel plate capacitor is given. Its plates are of thickness h, width L (in the plane of the figure) and their distance is D. The plates of the capacitor are perpendicular to the plane of the figure, which is at the same time the symmetry plane of the...
  34. T

    Parallel plate capacitor with two dielectric materials?

    Homework Statement Use Gauss' law to find an expression for the electric field within a charged parallel plate capacitor with two layers of dielectric materials (?r1 and ?r2). (See attached image, this is for question 2a). The Attempt at a Solution My approach would be to split the...
  35. K

    Conceptual problem regarding parallel plate conductors

    Homework Statement if two plates are kept parallel P1 and P2. one has a charge (q)..the outer surface of this plate has a charge let's say (x) thus the inner surface has a charge (q-x)..this (q-x) induces an opposite charge -(q-x) on inner surface of P2. the outer surface of P2 is grounded...
  36. S

    What is the force exerted on a point charge in a parallel plate capacitor?

    Homework Statement In a region of space between the plates of a parallel plate capacitor 14.0 cm apart, the electric field is 5.50 V/m everywhere. What force would be exerted on a point charge of charge value 2.50 C located 1 cm below the positive plate? 1 cm above the negative plate...
  37. J

    Parallel Plate Capacitor Conundrum

    Homework Statement Hi everyone, I'm new here at posting but have found this forum very useful in the past. I have hit a snag with a capacitor problem... any thoughts? Assume you have a parallel plate capacitor separated by one cm of air and one cm of a dielectric with a dielectric constant of...
  38. L

    Variance between two parallel plate capacitors

    I have performed the Millikan oil drop experiment, but after a acquiring data for 14 drops it was impossible to collect anymore data because the drops would keep moving out of view under the influence of an electric field. The thing is I made sure that everything was as level as possible and I...
  39. B

    Electric field inside a parallel plate capacitor

    Ok I took E&M about 3 years ago and decided I needed to review it. I'm up to gauss' law and am getting confused about one thing. If you have two infinitely long oppositely charged plates, solving for the total e field inside is done by making two gaussian surfaces that enclose each plate. Doing...
  40. B

    Parallel plate capacitor with a dielectric?

    If you have a simple circuit with only a battery and a parallel plate capacitor with a dielectric, what exactly happens when the battery is turned on? Also, if the voltage of a capacitor with a dielectric is less than the EMF of the battery, what happens to the rest of the voltage? One...
  41. D

    Parallel plate capacitor's plate distance is doubled, does the energy double?

    Homework Statement A parallel-plate capacitor is charged by being connected to a battery and is then disconnected from the battery. The separation between the plates is then doubled. How does the electric field change? The potential difference? The total energy? Explain your reasoning...
  42. B

    How does a parallel plate capacitor work (conceptually)?

    Homework Statement How does a parallel plate capacitor work (conceptually)? Also how does each plate get charged? Homework Equations The Attempt at a Solution
  43. C

    Calculating Charge on a Parallel Plate Capacitor

    Homework Statement A 5800-nF parallel plate capacitor is connected to a 14-V battery and charged. What is the charge Q on the positive plate of the capacitor? Homework Equations C = Q/V The Attempt at a Solution This looks like a very simple question. The capacitor is fully charged...
  44. T

    How Do You Calculate Parameters of a Parallel-Plate Air Capacitor?

    A parallel-plate air capacitor is made by using two plates 16 cm square, spaced 3.7 mm apart. It is connected to a 12-V battery. What is the capacitance? What is the charge on each plate? What is the electric field between the plates? What is the energy stored in the capacitor? What I...
  45. L

    Parallel plate capacitor's charge

    http://img94.imageshack.us/img94/4392/ppcapqs2.png http://img267.imageshack.us/img267/5059/ppcapqs1.png In this question the charge is calculated by isolating Q in E=surface charge density/absalon not My question is, the electric field of an infinite charged plane is E=surface charge...
  46. S

    Parallel Plate Capacitor - Finding E field between plates

    Why is it that the field magnitude between two plates in a parallel plate capacitor is given by q/(εA)? In my book it is stated that one plate is of charge +q and the other -q. But if each plate is charged, wouldn't you need to account for the electric field produced by both places making...
  47. H

    Parallel plate capacitor,displacement current.

    Homework Statement Consider a parallel plate air filled capacitor with plate area 10cm2 seperated by a distance 2mm.The potential difference across the plate varies as V=360 sin(2π 106t) volts, where t is in seconds.Neglecting the fringe effects calculate the displacement current flowing...
  48. K

    Energy needed to pull parallel plate capacitor

    Homework Statement a parallel plate capacitor of 10pF is charged to 10kV ( air dielectric). It is then isolated from battery.The plates are pulled away from each other until distance is 10 times more than before. what is the energy needed to pull the plates. Homework Equations c=εA/d ...
  49. B

    Charged ball hanging in equilibrium between two parallel plate capacitors.

    1. An experiment is run to determine the validity of numerous electrostatic principles. A small ball of mass 6.50 x 10-3 kg with a charge of ±1.50 μC is suspended from a non-conductive wire and hangs between two parallel plate capacitors. An angle of 30.0° is measured between the wire and the...
  50. T

    Nonisothermal Parallel Plate Flow Problem

    Homework Statement The problem wants us to develop an equation for velocity distribution and the mass flow rate of a fluid, flowing between 2 parallel plates: The distance between the two plates is a. The top plate is maintained at constant T1; the bottom plate is maintained at...
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