Charged Definition and 1000 Threads

So we have a cross sectoin of a sphere that is charged with Q (refer to attachment). electrostatics say the electric field within a charged conductor is 0, and the electric field is perpendicular to the surface. But for a hollow charged sphere (like in the attachment), does the hollow area...

Because of the "sea of electrons" holding a metal lattice together is it possible to charge that metal so much positively (by removing enough electrons) that it will break apart due to the unbalanced repulsion between positive nuclei? normally the interaction between the "sea of electrons" and...

If we drop a charged particle and a neutral particle at the same time(same hight) in a uniform gravitaional field, they will hit the ground simultaneously? on one hand：a freely falling charged particle will radiate according to a supported observer, so the radiation recoil (radiation...

A moving charged particle produces a magnetic field around it, thus a stationary observer would notice a moving electric and magnetic field. Does this moving magnetic field (as seen by the stationary observer) in turn produce another electric field?

Homework Statement What is the electric field at a point on the central axis of a solid, uniformly charged cylinder of radis R and length h? Homework Equations Well, I've set up the triple integral and have gotten to this point...

1. Two charged particles are traveling in circular orbits with the same speed in a region of uniform magnetic field that is directed into the page, as shown. The magnitude of the charge on each particle is identical but the signs of the charges are unequal. Which one of the entries in the table...

Homework Statement Consider a charge density of ρ=k/r , k>0 , located between a sphere surface of r=a and another sphere surface of r=b, b>a. I'm supposed to find the electric field on all space, which I did. Now I have to find the electric potential in all space, which I also did for r>b...

Homework Statement Why is it that when a charged object is near a stream of water (polar), it causes the stream to bend towards the object (attraction) instead of bend away (repulsion)? I know why the water bends, but why does it not REPEL instead? Homework Equations N/A just an...

I am having issues with multiple gauss' law problems. Assume we have a charged spherical surface. Inside the surface, E=0V/m. But why? I understand that at the center it should be zero due to symmetry, but why would it be zero at some point say, inside the surface but not at the center...

Homework Statement (From Physics for Scientists and Engineers, 7E, Serway-Jewett Chapter 25 Q11) (i) A metallic sphere A of radius 1 cm is several centimeters away from a metallic spherical shell B of radius 2 cm. Charge 450 nC is placed on A, with no charge on B or anywhere nearby. Next...

1. Problem statement A thin rod of length 2L has charge Q uniformly distributed along its length. 1. Draw a graph of the charge density as a function of x from -L to L 2. Find the electric potential at point P a distance y away 3. Use the result in part 2 of the electric field at point...

I apologize if this is the wrong category, Hello, this is my first time posting. I loved physics concepts and theories when I was younger but after taking two physics classes in college I realized that I was struggling with the math and had to give up on my dream to become a theoretical...

Homework Statement Three rods each of uniform charge Q and length a are formed into an equilateral triangle. Given[Q,a,q] determine: 1. The voltage at the center of the triangle. 2. If a charge -q is placed at the center of the triangle determine potential energy. 3. Determine the initial...

I've been looking into this relatively simple problem out of curiosity and I have to say I've thoroughly confused myself, hopefully someone can provide some insight: Imagine you have a massless (for simplicity) spherical shell with some overall charge on it that starts at a radius of...

So here we are talking about solving this problem by method of images. The approach taken by most of electrodynamics textbooks is as follows: "If we wish to consider the problem of an insulated conducting sphere with total charge Q in the presence of a point charge q, we can build up the...

~Electrodynamics~ Potential from charged sphere. I am lost :/ Homework Statement A sphere of radius R, centered at the origin, carries a charge density ρ(r,θ)=κ/r^2(R-2r)sin^2(θ). κ is constant. Find exact potential. Homework Equations 1/4∏ε∫ρ∂t/r The Attempt at a Solution Question and...

Lets say i have a infinitely long wire with charge per length, λ and a point, p of a position with its closest distance to the wire is y. The wire extend infinitely parallel to X-Axis. How to determine the voltage at the position p? Can i first regard the voltage contributed by a very small...

Electrostatics problem -- accelerations of charged beads Hi everyone Im reworking my MP homework and I can't seem to get the right answer for this problem(26.32). The set up says: A 1.5g plastic bead charged to -3.9nC and a 3.8g glass bead charged to 17.6nC are 2.2 cm apart(center to...

Ok so I have few question and would be happy if someone could answer them or reassure me of the way I think is right, thank you. First of all do electrons that have higher energy levels can attract two ions closer than electron with lower energy? Or is it a fundamental property that has to...

Imagine that we have a pair of parallel plates, A and B, separated by some distance as in Fig. 1 below. At time t_1 we simultaneously charge both the plates. This could be done by previously sending a light signal to a charging apparatus at each plate from a source located at the...

Homework Statement A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 10.5 cm, giving it a charge of -22.3 µC. (a) Find the magnitude of the electric field just inside the paint layer. (b) Find the magnitude of the electric field just...

Homework Statement The charged balloon expands as it is blown up, increasing in size. Here is a link. It is question 15. http://cf.linnbenton.edu/mathsci/physci/rajabza/upload/wkbk_solutions_27.pdf Homework Equations The Attempt at a Solution Is that answer correct...

Homework Statement An insulating sphere of radius a, centered at the origin, has a uniform volume charge density ρ. A spherical cavity is excised from the inside of the sphere. The cavity has radius a/4 and is centered at position h(vector) , where |h(vector) |<(3/4)a, so that the entire...

1. a sphere with mass 4.00 kg and charge of 5.00 C hangs from a thread near a very large, charged insulating sheet. The sheet is to the left of the sphere, and the sphere is is attracted toward the sheet, to the left. The charge density on the surface of the sheet is uniform and equal to...

Homework Statement A charge of 25nC is uniformly distributed along a circular arc (radius = 2.0 m) that is subtended by a 90-degree angle. What is the magnitude of the electric field at the center of the circle along which the arc lies? I'm not getting the right answer however, so if someone...

Homework Statement Two similar tiny balls of mass m are hung from silk threads of length L and carry equal charges q. The angle formed by the two strings is bisected by an imaginary line, forming angle θ. Assume that θ is so small that tan θ can be replaced by its approximate equal, sin θ...

Consider a situation where you have a charge at rest in a uniform magnetic field.A sharp impulse is given to the charge in a direction perpendicular to the magnetic field,if the velocity is high enough the charge which starts revolving in circular path should behave like a current carrying...

Homework Statement Show for a solid spherical ball of mass m rotating through its centre with a charge q uniformly distributed on the surface of the ball that the magnetic moment μ is related to the angular momentum L by the relation: \textbf{μ} = \frac{5q}{6mc}\textbf{L}Homework Equations μ...

1. Problem statement. 2. Known equations. E = k § dq/r^2 Lamda = Q/L 3. Attempt. I am having trouble figuring out the dq in this situation. I know that lamda = Q/L, and since those 2 are the variables that are changing I take the derivative of them so it looks like Lamda = dq/dL I...

Homework Statement So there's a rectangular region in the xy plane subjected to a magnetic field B with strength 0.06T pointing in the -z. A proton moving in the xy plane enters the region with velocity v such that the velocity components are initially vx = v*cos(24), vy = v*sin(24). It...

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...

E&M Problem -- 2 Charged Masses Hanging on Strings Homework Statement Two charges of identical mass m, one with charge q, the other with charge 2q, hang from strings of length l from a common point. Assume q is sufficiently weak so that any angle you're looking for is very small, and find...

Are photons capable of interacting with particles with no charge. And if not, is it possible that that's the reason dark matter has so far eluded detection: because it has no charge?

Homework Statement A particle with charge 3 μC is located on the x-axis at the point -10 cm, and a second particle with the charge 4 μC is placed on the x-axis at -4 cm. What is the magnitude of the total electrostatic force on the third particle with the charge 7 μC placed on the x-axis at -2...

A spherical shell and a conducting sphere each of radius R are charged to maximum potential. Which of the two has more charge? My attempt: Since in a conductor, no charge can reside inside the conductor so all charge is on the surface of the conductor just like the spherical shell. Now ...

When we Earth a positively charged sphere, the positive charge of the sphere vanishes. Why does this happen? When we connect two charged bodies doesn't charge redistribute till we get equipotential surface? Now when there is no charge on the sphere means the sphere has 0 potential. So that means...

When charged spheres are connected using a conducting wire, the charge will redistribute so as to make the potential constant because the connection makes them a single conductor and conductors are equipotential surfaces. My doubt was that if the spheres are of different size and have different...

This is rather strange and has been bugging me, from chapter 22 (Electric fields) of Resnick & Halliday: So suppose you have a charged disk of radius ##R## (the disk has no thickness and charge is uniformly spread on the surface of the disk). If you are at a distance ##z## away from the...

Hello folks! I've been trying to calculate the E-field of a charged ring. It seems well documented for a symetric point(a line from the center etc.) but what I'm interested in is say if I'm slightly of the center of the ring, how can I make a more general equation? I've tried calculating...

Hi...why the plates bcomes charged as soon as they are connecetd ?

Hi guys! This is related to a recent thread but since that thread became cluttered, I figured it would be more coherent to just ask the question here. Say we have a congruence of charged dust particles in some space-time with tangent field ##\xi^a##. The energy-momentum of the charged dust is...

I am relatively new to particle physics, and I seem to have reached confusion already. I do not seem to comprehend how you could measure the momentum of a charged particle just by exerting force and a magnetic field on it. The formula F = Bqv is mentioned when I hear of this, which does not...

I am wondering about why the electric field in a hollow sphere with charges on its surface would be zero. I have thought about the gaussian law argument for it. It only guarantees that the net number of electric field lines that pass the encloved surface are zero. But it says nothing about...

Q: "A graduate student tells you that he has observed a Schottky defect in a sample of pure aluminium. Explain why it may take a long time for this graduate student to get his Ph.D" A: "Pure aluminium has no negatively charged particles, so a Schottky effect can not occur." So I know a...

A rather simple question. A confinement of positively charged ions , a tube from the confinement and in the end of the tube a metal plate at a negative potential , if the charged ions are let to run towards the negative metal plate (which they would normally do) the plate would loose it's...

Homework Statement Hi, I am having problems trying to solve an electrostatics question. Basically there are two circular sectors of radius R and with angle 2β. Both of these sectors have their vertices at the same point in the xy plane (ie at the origin) but have a separation d in the z...

Homework Statement A hollow spherical conducting shell is suspended in air by an insulating string, so that the sphere is electrically isolated. The total charge on the conductor is -6 μC. If an additional point charge of +2μC is placed in the hollow region inside the shell, what is the total...

Say you have a charged, parallel plate capacitor, isolated from any external circuit. If you were then to gradually separate the two plates (or thicken the dielectric) what would happen to the charge on the two plates ?

Two charged objects of charge q. Coulomb's law states that the force on one sphere by the field of the other is: F = qE But each sphere experiences that, correct? So the tension for the string would be 2F. Is that correct?

Hello community, I'm new here. I'm using FORTRAN to model the motion of electrons and ions when accelerated under a high voltage potential. I'm using a fluid approximation and MHD-like equations (conservation of mass, energy, momentum) and a finite volumes numerical method to solve the...