Charged Definition and 1000 Threads

Homework Statement Problem: Two point charges of magnitude 0.1 μC and opposite signs are placed in a vacuum on the x-axis at positions -/+ 1, respectively. (a) Calculate the field intensity at the point (0, 1). (b) Approximate the value of intensity at a point 10 cm away from one charge...

Homework Statement A rod 14.0 cm long is uniformly charged and has a total charge of -22.0μC. Determing (a) the magnitude and (b) the direction of the electric field along the axis of the rod at a point 36.0 cm from its center. d (the distance between the center of the rod and the point)...

I have a question that I want to verify , so that i know is my understanding about how the LHC works. So basically there is this charged particle being thrown into a huge lone tube consisting of superconducting magnet rings and while each of the magnet rings has it's magnetic field traveling...

If I am orbiting a charged planet that is like being in free-fall around the planet. So would I see a B field in my frame? Is me orbiting the planet the same as me floating in space and have the planet rotate.

Homework Statement Homework Equations F=Keq1q2/r2 The Attempt at a Solution Using Coulomb's Law, here's what I've worked out: FAB=0.593N FAC=0.309N Fx=0.309 - 0.593cos60°= 0.0125 Fy=0.593sin60° =0.514 √(0.01252 + 0.5142) = 0.514 N/C and θ = tan-1(0.514/0.0125) = 88.6° I'm not sure why...

Homework Statement A small charged ball lies within the hollow of a metallic spherical shell of radius R. Here, for three situations, are the net charges on the ball and shell, respectively: 1 +4q, 0 2 -6q, +10q 3 +16q, -12q (a) Rank the situations according to the charge on the...

Homework Statement This is a problem I was thinking about which I haven't come across in my course. Two particles with mass, m, and a positive charge, q, are separated by a distance r0. One particle is unable to move while the other is released and is repelled. Find an equation for the motion...

Homework Statement A ring of radius 6 cm that lies in the yz plane carries positive charge of 7 μC uniformly distributed over its length. A particle of mass m carrying a charge of −7 μC executes small oscillations about the center of the ring on its axis with an angular frequency of 15...

[b]1. A solid sphere of radius a = 12.8 cm is concentric with a spherical conducting shell of inner radius b = 37.1 cm and outer radius c = 39.1 cm. The sphere has a net uniform charge q1 = 9.00×10-6 C. The shell has a net charge q2 = -q1. Find expressions for the electric field, as a function...

I wanted to know how to find the electric potential inside a uniformly charged sphere of radius R. What i understand is that my textbook uses a reference point as infinity and then expresses the potential as the difference of 2 integrals. Sooo, V(r)= -∫E dr and the electric field is...

Homework Statement A point charge q1 = -9.7 μC is located at the center of a thick conducting shell of inner radius a = 2.3 cm and outer radius b = 4.5 cm, The conducting shell has a net charge of q2 = 1.4 μC. 1) What is Ex(P), the value of the x-component of the electric field at...

Homework Statement Consider a string of N beads connected by N-1 rigid rods of length l. The system is considered as one-dimensional with rods only being aligned either up or down. The string is immersed in a fluid at temperature T and first bead is fixed at the origin y=0. A constant...

Homework Statement Two 10-cm-diameter charged disks face each other, 17 cm apart. The left disk is charged to +40 nC and the right disk is charged to -40 nC. a)What is the electric field, both magnitude and direction, at the midpoint between the two disks? b) What is the force on a -1.0...

A sphere of radius a in free space is nonuniformly charged over its surface such that the charge density is given by ρs(θ) = ρs0 sin 2θ, where ρs0 is a constant and 0≤θ≤∏. Compute the total charge of the sphere. So I know ρs = dQ/dS Integrating the surface charge density function will...

Hi, I am looking at a problem where I have two electrically conducting fluids where charge accrues on the interface, I know that one of the equations that I have to use comes straight from the usual boundary conditions for the normal component of the electric field, the other one apparent comes...

Homework Statement Solid ball of charge with radius R and volume charge density ρ(r) = ρ0r2, centred at the origin. I have already found the electric field for r<R and r>R and also the potential at the origin by using the formula: V = -∫E.dl Now i want to find the potential at the...

For a charged metal sphere of charge "+q" is the following statement true ? all the excess charge is in static equilibrium The statement basically implies that the excess charge on the surface can't (and does not) move, hence supporting the theory that the Electric Field lines emerging...

I have heard of a project where the military hooks up many large capacitors (with short discharge time coefficients) to a bar of aluminum and the end result is an extremely bright explosion. Could someone expand on exactly what is happening here?

Hello Friends, I was trying to illustrate intuitively (rather than rigorously) the equivalence of negative energy solutions moving backward in time to be equal to a particle of opposite sign a la Feynman. I begin with a quote from the maestro himself "A backwards-moving electron when...

Homework Statement A very long cylinder has charge density L/m and radius a. Find the electric field at a distance r, with r > a. The Attempt at a Solution I construct a gaussian cylinder around it with radius r, and then from Gauss' law the field at any point on it's side surface is E=...

Idea... charged particle berrier use of ionized particles moving at such high voilositys to and from 2 points such as copper and aluminum detract and attract so any objects that move between the 2 points gets intersected by the charged particles and destroyed or displaced.

Homework Statement What are the strength and direction of an electric field that will balance the weight of a 1.0g plastic sphere that has been charged t0 -3nC ? Homework Equations E= F/q The Attempt at a Solution Newton's laws on the charged sphere ƩFnet(y) = F -mg=0...

Homework Statement Suppose a strength that acts between two charges depends on the distance, 1/r^a, where 1) a>2 2)a<2 What will happen with a punctual charge, if it is put within a uniformly charged sphere. At the initial moment the punctual charge is in rest. Homework Equations F...

What 'could' happen when a high speed electron hits a stationary cathion?

Is it possible to construct a portable ground using an positively charged electret? I think it would be useful to a have an electrical ground that you can move with you anywhere, so that way no matter how powerful a device is, you could use it on the go without risking electrocution. Is it...

Initially, a 15uF capacitor is charged by a 100V battery. Once charged, it is disconnected from the battery and connected to two uncharged capacitors(C_2 = 20uF, C_3 = 30uF) in parallel. What is the charge and potential difference on each capacitor. (The two capacitors mentioned above are in...

Homework Statement Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.108N when their center-to-center separation is 50 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with...

A metallic sphere of radius R is cut in two parts along a plane whose minimum distance from the sphere's centre is h and the sphere is uniformly charged by a total electric charge Q. What minimum force is necessary to hold the two parts of the sphere together? The Real trivia The solution...

If we had a positive point charge of incredible quantity, does there exist an imaginary sphere about it, such that regardless of the initial speed and direction of any electron, that electron could not escape spiraling into the positive point charge? Conversely, regardless of the initial...

Homework Statement Two insulating spheres have radii 0.300 cm and 0.500 cm, masses 0.200 kg and 0.700 kg, and uniformly distributed charges of -2.00 µC and 3.00 µC. They are released from rest when their centers are separated by 1.00 m. (a) How fast will each be moving when they collide...

[I have attached a diagram of the setup below]. I am trying to understand how exactly a parallel-plate capacitor [the one with two metal plates separated by a dielectric] gets charged. This is what I have gotten so far. 1) When the capacitor is in its uncharged state, both metal plates...

Homework Statement A small positively charged sphere of mass m is attached to a very large positively charged vertical plate by a string and hangs due to gravity. The charge density on the plate, σ, is uniform. a) Calculate the equilibrium position of the ball as a function of the (uniformly...

Homework Statement Problem 27.9 Two 10-cm-long thin glass rods uniformly charged to +10nC are placed side by side, 4.0 cm apart. What are the electric field strengths E1, E2, E3 and at distances 1.0 cm, 2.0 cm, and 3.0 cm to the right of the rod on the left, along the line connecting the...

Let's say I have a sheet of charge that is composed of a certain amount of charged atoms summing up to Q and a certain area A. The charge density would be Q/A = σ. I wish to find the elctrostatic potential from the sheet at point X. I believe that the electric potential should follow the...

Homework Statement Find the electric field above the center of a flat circular plate of radius a when the charge distribution is br^{2}δ(z) for r≤aHomework Equations The Attempt at a Solution i didn't get the intgeral resulting form coulomb's law working, so i tried with the potential, the...

Homework Statement Use direct integration to find electric field inside a uniformly charged non-conducting solid sphere. The radius of the sphere is R, observing point is at a way from center of the sphere while a<R. Homework Equations Use Coulomb's law only. No Gauss law is allowed. You may...

Hello! I'm having a bit of a struggle understanding the logic behind these two questions. A 2.2 uF capacitor is charged to a potential of 15V, and a 3.3uF capacitor is charged to a potential of 30V. The capacitors are then joined together as in the circuit diagram. When the switch s is...

Homework Statement An electron starts from rest 2.80 cm from the center of a uniformly charged sphere of radius 1.83 cm. If the sphere carries a total charge of 1.01×10-9 C, how fast will the electron be moving when it reaches the surface of the sphere? Homework Equations UI + KI =...

Homework Statement Find the pressure on a uniformly charged spherical conducting shell of Radius R and total charge Q. The answer is (Q^2) / (32*π*ε*R^4) I´m fine doing this using the derivative of the energy as the sphere grows to get the force. My question is: Why do I get twice the answer...

Accelerated charged particles radiate photons. If I am accelerating along with the particle will I see it radiate?

This problem is driving me mad suppose that we have a positive charge inside a non conducting spherical shell uniformly charged the charge is at a random place inside the shell but not in the center the textbook says the charge will feel no force from the charges of the shell and the...

The volume charge density of spherical shell varies as ρ=-kr.If we have to calculate electric filed using gauss's law, can we treat as E. dA as E(dA) as there is azimuthal symmitry Homework Equations The Attempt at a Solution

For example, when a radioactive isotope of Uranium undergoes alpha decay, a radioactive isotope of Thorium is formed. Why isn't this daughter isotope charged?

I am an undergraduate physics student and found myself thinking about a scenario where two positively charged projectiles are fired at an angle to the horizontal at a velocity with a certain separation. So they will be subject to a gravitational force and perpendicular to this, an electrostatic...

hi i need an equation which can describe the charging time of two parallel capacitors one of them is %50 charged and if i have a capacitor which is always charged from 50% to 100% and never fully discharged will it have a different impedance than the fully charged/discharged capacitor?

It sounds like an easy-enough problem, but even writing down the ridiculously nonlinear equation that would need to be solved is making my face hurt. I'm talking classical/Newtonian gravitation, action-at-a-distance, constant-force. It could really be any external non-EM conserved force...

Hey, I have a series of questions on a basic charged sphere and deriving quantities such as the infinitesimal charge, the total charge and the electric field. The question is part (b) in the image below: So I found dQ' by equating it to the surface area of a shell at a distance r'...

Homework Statement The outer conductor (radius b, length l) of a long cylindrical capacitor is earthed. The inner conductor (radius a, length l) is hollow, insulated and uncharged. A sphere of radius R is charged to a potential V far from any other bodies and is inserted inside the inner...

Homework Statement A soap bubble of radius 0.1mm has a wall thickness of 3.3x10^-8m, and is charged to a potential of 100V. Give a formula for the charge of the bubble. I know this is probably a really easy question, but I've only ever done problems with spheres of negligible wall...

Homework Statement The graph in the figure shows the electric field strength (not the field lines) as a function of distance from the center for a pair of concentric uniformly charged spheres. Which of the following situations could the graph plausibly represent? (There may be more than one...