Charged Definition and 1000 Threads

Homework Statement A dipole consisting of charges +/- e 220 nm apart is placed between two very large (essentially infinite) sheets carrying equal but opposite charge densities of 125 uC/m^2. a) What is the maximum potential energy this dipole can have due to the sheets, and how should it...

Imagine I am sitting on a lead ion and fly happily through the LHC tube :approve:. Suddenly I feel an strong force pushing me sideways to the left. A physicist sitting in the lab frame tells me later, that I have been going through a dipole magnet yoke with field lines from top to bottom...

Homework Statement Two parallel, very long strips are uniformly charged with charge densities \rho_{s} and - \rho_{s}, respectively (\rho_{s} > 0). The cross section of the structure is shown in the figure attached. The width of the strips is the same as the distance between them (i.e. a)...

Homework Statement A line charge of uniform charge density Q' is distributed along a square contour a on a side. The medium is aie. Find the electric field intensity vector at a point that is at a distance a from each of the square vertices. Homework Equations The Attempt at a...

Homework Statement A uniformly charged insulating rod of length 14.0 cm is bent into the shape of a semicircle. The rod has a total charge of -7.50\muC. Find (a) the magnitude and (b) the direction of the electric field at O, the center of the semicircle. Homework Equations...

Hi. I want to know if I did this on the right way. The exercise says: An infinite hollowed cylinder, with the cavity being another concentric cylinder has a uniform charge density. Find the electric field and the potential over all space. And this is how I proceeded. I've called the inner...

Hello all, I got this question off mastering physics and was unable to understand it. I eventually gave up to concentrate on other assignments and asked for the answer. I was unable to come up with more than one answer I thought possible without resorting to trial and error. Answer: Vx,Vy,Vz =...

Homework Statement Identical isolated conducting spheres 1 and 2 have equal charges q and are separated by a distance r large compared to the diameters of the spheres. The electrostatic force acting on sphere 2 due to sphere 1 is 3.10-6N. Suppose now, that the third identical sphere 3, having...

Homework Statement Show for a solid spherical ball of mass m rotating about an axis through its center with a charge q uniformly distributed on the surface of the ball that the magnetic moment \mu is related to the angular momentum \vec{\mu}={\frac{5q}{6mc}}\vec{L} Homework...

Homework Statement A charged particle with mass m = 200g and charge q = 25 µC is suspended from an elastic cord with force constant K = 5 N/m in a vertically upward electric field E of magnitude 3.7 x 10^5 N/C. What is extension of the cord when the particle is in equilibrium? Homework...

Homework Statement A point charge q1 = -7 μC is located at the center of a thick conducting shell of inner radius a = 2.6 cm and outer radius b = 4.9 cm, The conducting shell has a net charge of q2 = 1.1 μC. What is Ex(P), the value of the x-component of the electric field at point P...

"Diameter of a soap bubble increases when it is charged." why?

A charged hollow sphere with surface charge density \sigma & radius R is cut into two hemispheres...certainly the hemispheres with equal charges on them would repel each other...Now a force is applied on both the hemispheres to align them again as the original sphere..i shall be highly thankful...

Homework Statement the e field is given by (2*pi*k*omega)[1-(1+(R^2)/(z^2))^-.5] I was wondering if the capital R in that equation is the radius of the charged disk? And if so, why is it capitalized?

In a very good book, Chabay and Sherwood explain that when an initially uncharged person touches a negatively charged metal object, free electrons from the metal neutralize some Na+ ions in the salty layer on the person's skin. The person then becomes negatively charged and the neutral Na atoms...

An accelerating charged particle produces EM radiation. Does gravity cause this effect as well? Does the particle actually accelerate due to it or would it not since it would be following a straight path through curved spacetime? I'm guessing the particle would not create EM radiation, but I'm...

Hi I'm sorry if this is posted in the wrong section or it's laid out wrong but I have a question that I need a bit of help with. Homework Statement I'm given: A spherically symmetrical charge distribution is contained within a sphere of radius a with no charge outside. At a distance r (r...

Homework Statement A particle of mass m and charge q is attached to a spring with force constant k, hanging from the ceiling. Its equilibrium position is a distance h above the floor. It is pulled down a distance d below equilibrium and released, at time t = 0; Under the usual assumptions...

Homework Statement Two hard rubber spheres, each of mass m = 15.1 g, are rubbed with fur on a dry day and are then suspended with two insulating strings of length L = 4.90 cm whose support points are a distance d = 2.97 cm from each other as shown in the figure below. During the rubbing...

Anders (not the monster) became only 18. As he and two friends tried two hide from the shooter they heard, they tried to secure a place on a mountain ledge, but Anders slipped and fell 10 meters onto the stony shore. He was killed by that accident. Håkon became only 17. Håkon was not a...

I am considering a positive charged particle moving with the velocity v into the magnetic field field B making an angle theta with the magnetic field, so the magnetic force exerted on the charged particle is perpendicular to the plane of B and v. My question is-Why the speed of the charged...

Homework Statement Two identical metal spheres, each with a positive charge q, are separated by a centre-to-centre distance r. What effect will the following change have on the magnitude of the electric force exerted on each sphere by the other: -one sphere is touched by an identical...

I would like to determine the negative charged level on q2 particle, referring to following image, q1 is charged particle with x unit of positive charge, which q1 diameter is 80 cm, on the other hands, q2 is a neural particle, which q2 diameter is 30 cm. Both charged particles are separated in d...

Homework Statement A 2.50-mg dust particle with a charge of 2.00 µC falls at a point x = 2.80 m in a region where the electric potential varies according to V(x) = (2.00 V/m2)x2 − (1.00 V/m3)x3. With what acceleration will the particle start moving after it touches down? (Enter the magnitude of...

Homework Statement Two infinite-plane non-conducting, thin sheets of uniform surface charge p1 = 13.35 uC/m2 and p2 = -8.65 uC/m2) are parallel to each other and d = 0.245 m apart. (As shown in the diagram below.) What is the electric field between the sheets? (Note: the field is positive if...

Classical charged particle's reaction to a retarded field This is something I've been curious about for a while -- every once in a while, I'll see some random reference to it in an article, but I never feel like it's the whole story. The situation is this -- you have a moving classical...

Is it possible to have a massless charged particle in nature?

The Earth has been struck by lightning for 4.5 billion years.Then why is it that the Earth has acquired no [or negligible] charge. I Have also heard that their is a permanent potential difference between the Earth's atmosphere and surface.What is the cause of this?Why doesn't lightning...

Homework Statement Here is the question: Thin rod AB has length l=100 cm and total charge q=37 nC that is distributed in such a way that its line density ? is proportional to the square of the distance from the end A, i.e. ?(x) =kx^2. Determine electric field E at the end A of the rod. ...

Homework Statement Thin rod AB has length L=100 cm and total charge q0=37 nC that is distributed in such a way that its line density \lambda is proportional to the square of the distance from the end A, i.e. \lambda(x) =kx^2. Determine electric field E at the end A of the rod. Homework...

hi, i just wanted to know if i am right, that the electric field of a charged non-rotating black hole at distance r is: E=\frac{Qq}{4 \pi \epsilon_0r^2}\sqrt{\left(1-\frac{2GM}{c^2 r}+\frac{Q^{2}G}{4\pi\epsilon_{0} c^4 r^2}\right)c^2}

Let us consider a fixed Carthesian reference frame (x y z) with a charged (+) particle locate in its origin. Moreover, let us consider two parallel conductors of infinite lenght, carrying the same current I (in the same direction y). The two conductors move at constant velocity from the origin...

Hello! I'm redesigning my never-to-be-finish sci-fi novel, yet another futile to come up with scientifically based interstellar travel propulsion. My latest consideration is based on article[1] and possible extensions of those ideas. Anyway, I'm looking for an independent opinions on the...

The equation for the force of a magnetic field on a moving charged particle would say no: F = q * v x B, which means the force is always perpendicular to v, and never has a component along v. Thus a magnetic field can't accelerate a particle, only deflect. This is correct, right? If...

When a capacitor is fully charged does it block AC or DC?

Homework Statement Hi, I have a solution to this, but I am looking for a more elegant solution. If we are given 4 positively charged particles at the 4 corners of a square, is there a better proof for the stability of the central point of square for a 5th positively charged particle apart from...

I'm working on something right now where I want to model the flow of an electrically charged gas (hydrogen) reacting to an electrostatically charged metal grid. I know, more or less nothing about this type of mechanics, so I want to create a model using a simple programming language, with a...

3. Two electrons are fired at 3.5x10^6 m/s directly at each other. (a) Calculate the smallest possible distance between the two electrons. (b) Is it likely that two electrons in this situation will actually get this close to each other if the experiment is performed? Explain your answer...

In my class we were doing examples with a current carrying wire and if we moved with a speed v we would see length contraction. And because of this the moving line charge would go up in value and we would see an Electric field. And then we did the same for a solenoid but he said we need to...

Homework Statement Two charged objects Q1 = +4Q and Q2 = -Q are located on the x-axis. Q1 is at the origin and Q2 is at the x = +S m position. You also have a test charge +qo Homework Equations F = kQq/d2 The Attempt at a Solution So you find that qo is past Q2 on the x-axis...

Homework Statement Hey guys I was wondering if you can help me out on these two questions i have. They're due by Wednsday so i'd appreciate if i can get a reply to se if my work is right on these by then. Thanks Question 1) A small spherical insulator of mass 80 grams and charge +1.80 x...

okay this isn't really a homework problem, we just got done doing a uniformly charged sphere, but in a good conductor electrons are going to repel each other and move to the surface, and that got me thinking. How do you find the potential inside a uniformly charged SHELL. Someone said the...

Homework Statement When given Q, ω, and geometry of a cylinder (radius a, length L) how do you come up with current I*n ? the cylinder is rotating around the axis through the center of the cylinder this question is essentially the same as finding magnetic field for a solenoid... I just...

Homework Statement Two charged particles q1 and q2, both of m=10g: q1-----O----------q2 |-5cm-||----10cm--| q1=4 microC q2=-2 microC Find the velocity of q1 when it passes O. Homework Equations (for some reason latex isn't working on my browser) a=dv/dt=(dv/dx).(dx /t)=v.(dv/dx) Both...

what would happen if I take apart the plates of a charged capacitor? Would the plates stay charged, or will the plates loose their charge? will the energy stored in the capacitor during charging stay stored in the plates though there is no more existence of electric field?

Homework Statement A very long (infinite), straight line of charge runs parallel to another very long (infinite) straight line of charge. Both lines are uniformly charged, one with +1*(lambda) and the other with -2*(lambda). The distance between them is d. Find (if any) the location(s) where...

Homework Statement Hi there. I am currently taking physics 30(algebra physics course) and we are in the electrostatics unit. I am curious as to why, when trying to find the force acting on a charged particle moving perpendicular to a magnetic field, the force results in a direction that is...

I have a hot gas with a net negative charge that I want to keep contained using an electric field. My question is how do I calculate the electric field strength necessary, and how would one go about producing it?

Homework Statement I have a basic understanding of electrostatics. I know that when I rub a balloon with wool, both the wool and the balloon will become charged. I know that if I bring my charged balloon near neutral paper, the paper will be attracted because of charge polarization. I thought...