Conducting Definition and 533 Threads

Homework Statement A capacitor is formed of two concentric spherical conducting shells of radii r1 and r3. The space between the shells is filled from r1 to r2 with a dielectric of relative permittivity \epsilonr1 and from r2 to r3 with a dielectric of relative permittivity \epsilonr2...

A spherical conducting shell has an inner radius R1 and outer radius R2 There is a charge Q1 spread uniformly on the inner radius THere is a charge Q2 spread uniformly on the outer radius what is the potential for a distance R1<r<R2? What is the potential for a distance r<R1...

1. A thick conducting cylindrical shell has an inner radius Rsub1 and outer radius Rsub2. It has a net excess charge = Q, and it is L long. Find electric field at certain points given. Ok, when r is less than Rsub 1, the electric field is zero. And when r is greater than Rsub2, it is easy to...

i've just had this thing running through my head that I'm trying to resolve: 1. two parallel wires that conduct a current (same charge carriers) will attract one another, that is the magnetic force each wire emits due to the flowing current will induce an attractive force in the other (charge...

This is a problem I found while studying for an exam I have next thursday, and conceptually it doesn't make any sense for me! NOTE - This is not a dieletrics problem. Homework Statement A conducting slab with a thickness d and area A is inserted into the space between the plates of a...

Hi guys, New here! So bear with me. I know this question has been answered partially before. I have a little confusion however. Question: two large neutral conducting sheets are connected by a wire and at a distance D from each other. A charge +q is placed a distance b from one of the...

A bar magnet falling vertically through a stationary horizontal loop of conducting wire. Then, there are two questions related to this problem. 1. As the south pole of the magnet approaches the loop, the current in the loop 1) decreases 2) increases 3) remains the same 2. As the south...

Homework Statement Two conductors, A and B, are each in the shape of a tetrahedron, but of different sizes. They are charged in the following manner: 1) Tetrahedron A is charged from an electrostatic generator to charge . 2) Tetrahedron A is briefly touched to tetrahedron B. 3) Steps 1...

-------------------------------------------------------------------------------- I need to find the work it would take an applied force to assemble a conducting sphere of radius R and charge Q at constant kinetic energy from infinity. Tried: Since the Electric Field inside the conductor...

An uncharged spherical conducting shell surrounds a charge -q at the center of the shell. The charges on the inner and outer surfaces of the shell are respectively... For this question I know that the charges are going to be +q, -q respectively. However, what if the center charge wasn't...

A thin charged (charge=Q) ring of radius a centered on the z axis lies in the x-y plane. The potential outside the ring is given. Now the ring is placed inside a grounded conducting spherical shell of radius b > a. What is the potential inside the ring and between the ring and the sphere...

Hi everyone. I'm having a bit of trouble with finding an electric field. Basically, I'm trying to understand the formula for a cylindrical capacitor, so the method involves integrating the field between two conducting cylindrical shells. Firstly can Gauss's law be used in this case, because the...

Hi everyone, I have some queries regarding the situation where a point charge is placed at a distance from an infinite conducting plane:say the plane is the xy plane and the charge is above it at distance z: 1) If the plane is at non-zero potential, is that true that the plane will not...

Homework Statement A point charge q is located in the xy plane near two grounded conducting planes intersecting at right angles as shown in the Figure. The z axis lies along the line of intersection of the planes. Find and justify (mathematically show) the force acting on this charge q...

A 0.380 m long cylindrical capacitor consists of a solid conducting core with a radius of 1.15 mm and an outer hollow conducting tube with an inner radius of 2.05 mm . The two conductors are separated by air and charged to a potential difference of 6.40 V . Calculate the charge per length for...

hey everybody, I am doing a physics project on the double slit experiment. (I know all the physics and math behind it so don't get into that stuff :P) I was just wondering if people had any suggestions on how to conduct the experiment, I was thinking of cutting two extremely small (knife blade)...

[SOLVED] Magnetic Field in a Rectangular Conducting Loop Homework Statement Figure 31-64a shows a rectangular conducting loop of resistance R = 0.010 , height H = 1.5 cm, and length D = 2.5 cm being pulled at constant speed v = 55 cm/s through two regions of uniform magnetic field. Figure...

Homework Statement Show that the energy associated with a conducting sphere of radius R and charge q surronded by a vacuum is given by u=kq^2/(2R). Homework Equations The Attempt at a Solution

Why the field lines are always perpendicular to the conducting line?

Homework Statement two thin conducting spheres, one inside the other. They are both centered about the same point. The outer sphere has a total charge Q and radius R2 and the inner sphere has a total charge -Q and radius R1. The magnitude of the charges is Q = 500 nC, and the radii are R1 =...

Let me preface this as this is my first post on this forum. I'm a physics major at Virginia Tech and I've lurked the forum for a while to help understand concepts that may not be intuitive initially. I'm stuck on this one concept, so I decided to give posting a shot. Without further ado...

Homework Statement A grounded conducting hollow sphere of radius a contains a ring of radius b and charge per unit length \Lambda. The ring is coaxil to the z axis, and with the sphere lies a distance d about the center of the sphere such that d^2 + b^2 < a^2. Find the potential within the...

Homework Statement An infinitely long conducting cylindrical rod with a positive charge "lambda" per unit length is surrounded by a conducting cylindrical shell (which is also infinitely long) with a charge per unit length of "-2 lambda" and radius r1. a) What is E(r) , the radial...

How exactly do conductors conduct electrons? I'm confident with Maxwell's equations and I can accept a classical treatment like \sigma=\frac{nq^2\tau}{m} where \tau is the scattering rate. So actually I'd like to know what exactly happens with the electromagnetic fields when a voltage...

A conducting loop around a magnetic field contains two light bulbs. as shown int the figure. The wires connecting the bulbs are ideal. The magnetic field is increasing rapidly. A. Do the bulbs glow? why or why not? B. If they glow, which bulb is brighter? or are they equally bright? explain...

When a charge is applied to a conducting sphere and connected to another conducting sphere by an ideal thin wire (infinite distance apart), the potential at the surface of each sphere is the same. However, that means (for spheres of different radii) that the charge density on each sphere...

I have a problem, to do with conductor in a magnetic field. The question says to find the length of the conducting armature with the magnetic flux. I was planning on using the formula F= BIL. I have alright calculated the flux density and got the current, however the force is not given so I...

Was curious how some of you guys would solve this problem... Three conducting spheres of radii a, b and c are connected by negligibly thin conducting wires. Distances between the spheres are much larger than their sizes. The electric field on the surface of a is measured to be E_{a}. What is...

Homework Statement A solid conducting sphere carrying charge q has radius a. It is inside a concentric hollow conducting sphere with inner radius b and outer radius c. The hollow sphere has not net chare. a) Derive expressions for the electric field magnitude in terms of the distance r from...

Homework Statement A 32 cm diameter conducting sphere is charged to 500 V relative to V=0 and r = infinity. (a) What is the surface charge density sigma? (b) At what distance will the potential due to the sphere be only 10 V? Homework Equations The Attempt at a Solution I...

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...

Homework Statement Consider a solid conducting sphere with a radius 1.5 cm and charge -4.4pC on it. There is a conducting spherical shell concentric to the sphere. The shell has an inner radius 3.7 cm and outer radius 5.1 cm and a net charge 27.4 pC on the shell. A) denote the charge on...

Homework Statement This is a Problem 7.7 fom Griffiths Introduction to Electrodynamics (3ed) A metal bar of mass m slides frictionlessly on two parallel conducting rails a distance l apart. A resistor R is connected across the rails and a uniform magnetic field B, pointing into page...

Homework Statement 9. Two identical conducting spheres, fixed in place attract each other with an electrostatic forces of 0.108 N when their center-to-center separation is 50.0 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each...

Homework Statement A thin, spherical, conducting shell of radius R is mounted on an isolating support and charged to a potential of -V. An electron is then fired from point P at a distance r from the center of the shell. (r>>R) with an initial speed v_0 and directly towards the shell's...

Homework Statement Part A: At a distance of 0.192 cm from the center of a charged conducting sphere with radius 0.100 cm, the electric field is 445 N/C. What is the electric field 0.614 cm from the center of the sphere? Part B : At a distance of 0.212 cm from the axis of a very long...

Homework Statement A long, straight conducting wire of radius R has a nonuniform current density J=J0*r/R, where J0 is a constant. The wire carries total current I. Find an expression for J_0 in terms of I and R. Find an expression for the magnetic field strength inside the wire at radius r...

I was wondering what the energy density of superconducting coil/tape is. I essentially what to be able to say is for every centimeter or inch of this material this is the amount of energy could be in it (kW, kWh, etc). So the background; I would like for the parameters to be for...

Homework Statement Two conducting spheres of the same size have charges q1=-4x10^-6 and q2 = 8x10^-6C,and their centers are separated by 3.0cm a) what is the force between them? b) what would be the force if the spheres were touched together and again separated by the same distance...

Homework Statement A very long conducting tube (hollow cylinder) has inner radius a and outer radius b. It carries charge per unit length +alpha , where alpha is a positive constant with units of C/m. A line of charge lies along the axis of the tube. The line of charge has charge per unit...

Homework Statement An infinite conducting sheet has a hemispherical bubble of radius a. (Refer to the diagram) 2. The attempt at a solution ok i know the boundary conditions should be (Phi refresents the potential) And we are working in CGS units... units with which i am not entire...

E&M: Using Laplace's Equation to solve for a conducting "slit" Homework Statement The set up is as follows: You have a conductor at potential 0 along the y-axis at x=0. You have another conductor at potential V=Vo running along the x-axis at y=0. You have a third conductor at potential V=Vo...

Homework Statement a long conducting cylinder with inner radius a and outer radius b carries a current along its central axis. blah blah blah, i found the current density. now how do i calculate the area of the cylinder with a hole in it? is it A = pi (b-a)^2 OR is it A = pi ( (a+b)/2)^2

So I have an upcoming project that I started working on. I thought I had the foundation to actually tackle the task at hand, but now that I've started it, I realized I'm kind of weak with some fundementals. If someone would be so kind to read what I am going to type, and add to it, or tell me...

Last night my cousin and I were arguing the conductivity of water. I was taught that water is a conductor of electricity, but he claims otherwise. So, we did a simple experiment using tap warm water, a 1.5v battery and small light bulb. It refused to conduct and the light bulb would not...

I never really understood this... Lets say we have a positive point charge Q at the center of a spherical conducting shell of an inner radius Ri and an outer radius R0. Now my books says that an amount of negative charge equal to -Q must be induced on the inner shell surface (R=Ri), and...

two spheres are

Hi, We know that when we connect the two parallel plates to a battery it will hold a +ve charge on the plate connected to positive terminal and -ve charge on the other plate. If we only connect one plate to the positive terminal, can it be charged? Isn't the positive terminal is at a...

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...