Electrostatic Definition and 884 Threads

Hello! I'm Steven, and I'm currently working on the following problem: The Earth can be seen as a conducting sphere with an electric field: E= -(150V/m)r (on its surface) and where r is the unit vector . The Earth has a radius 6371 km. So, I am asked to calculate the electrostatic potential...

Hey guys, I want to ask a question about the Coulomb force or the electrostatic force. As you can see, there are these statement, 1) The electric force is a "vector quantity" 2) The electric force between two stationary charged objects is called the Electrostatic force. 3) The electrostatic...

Homework Statement I don't exactly conceptually understand what the potential is. The electric field is a vector at a given point from the charge that describes the strenght and the direction of the fields. Potential is given as a potential of a point in referenve to another point in spave? I...

Homework Statement A ring charge of total charge Q and radius a is concentric with a grounded conducting sphere of radius b, b < a. Determine the potential everywhere. The ring is located in the equatorial plane, so both the sphere and the ring have their center at the same spot. Homework...

Homework Statement The Spherical region a<r<b carries a charge per unit volume of $$\frac{A}{r}$$, where A is constant. At the center there is a point charge q. Find A such that the Electric field in a<r<b is constant. Homework Equations Law of superposition and $$E=\frac{kq}{r^2}$$ The...

1. Passage of current via coil creates magnetic field (fig a), similarly external magnetic field linked to coil when changed created electric current in the circuit connected ( Faraday's em induction fig b). 2. Charging of capacitor using voltage source creates electric field in the capacitor...

Homework Statement What potential difference is needed to give a helium nucleus (Q = 3.2 × 10-19 C) 50 keV of kinetic energy? Homework Equations V=U/Q 3.2 × 10-19 C = 2e The Attempt at a Solution I was quite sure I had the right answer but it keeps saying I'm wrong? V = (50*10^3 eV) / 2e =...

Homework Statement An electric dipole consists of +/- Q = 330nC separated by a distance of 1200nm. The dipole is initially oriented in the -i direction (along the negative x axis). The dipole is in a uniform external electric field of E=2500j N/C Determine the following: a) The magnitude of...

Homework Statement When a -2C is moved from point A to B, the potential energy of the system increases by 10J. What is the voltage V(ab)? Homework Equations U=qV The Attempt at a Solution 10=(-2)V, I thought the voltage was -5V but the correct answer is +5V. Could someone explain why this is?

Homework Statement Homework EquationsThe Attempt at a Solution i don't understand what happens at the end, when the pail becomes negative charged!. my assumption is that since the positive charged nylon rod is making the electrons to closed together in one side of the pail by attraction...

Homework Statement hi, in my physics lab we did an expirement where we had to use an vernier electrostatic kit. So it consisted of placing a metal can inside a metal cage, and both were attached to an plastic disk, and below was a metal plate which was used for grounding. A black wire was...

So the potential inside a conductor is constant. Does this mean that if there were a conductor, B, inside another conductor, A, the charges of A/B would redistribute such that the electric field inside would be zero (hence constant potential)? This seems logical but a bit too easy? Also, if it...

I've been looking through the internet and I haven't found anything too clear on this: is it correct to assume a electrostatic interaction, say, between two stationary electrons as an exchange of virtual photons?

I know that the curl of electrostatic field vector is zero. I want to know what will be the curl of electrostatic field at the edge region of the finite parallel plate capacitor?

What's the difference between electrostatic charges& electric charges

I would like to understand if someone has tried/or atleast if its feasible to make a Electrostatic precipitators that captures automotive pollution from sources like this? Does the physics allow to do that?

1.e problem statement, all variables and given/known data Two positrons and two protons are kept on the four corners of a square of side a. Positrons are kept at vertices A and C and protons are kept at B and D. let q denote the charge on both positron as well as the proton. So what is the...

Homework Statement We model the Hydrogen atom as a charge distribution in which the proton (a point charge) is surrounded by negative charge with the volume density of ρ = -ρ0 * exp (-2r/a0) where a0 is the Bohr radius. And ρ0 is a constant chosen such that the entire atomic distribution is...

I have been looking into the forces exerted by electrostatic fields and have come up with different answers using two different methods. I would appreciate any help in pointing to a reference that will reconcile this or point to an error in my methods. To keep things simple I am using a one...

Hello. Well, each and everyone of us know that Like Charges repel, while unlike charges attract. That's a normal high school physics fact. But what's the reason for that? Is it just an experimental fact, or even does have theoretical significance? Please do help. Thanks a lot Swapnil Das.

Formula for Electrostatic Potential due to a point charge is V=1/4π∈ Q1 Q2/r This implies that at r=0 value of the potential should be infinity. Is it True. If that is the case then how we say the terminals of a battery having positive and negative charge are having definite value of...

Homework Statement Is there a difference between electric, electrical and electrostatic force? Homework EquationsThe Attempt at a Solution I used them interchageably. Is it incorrect?

Homework Statement [/B] Thin rod of length l is placed with one of its ends at the center O of the (thin circular )ring of radius R as shown (Figure 1), perpendicular to the plane of the ring. The rod is charged with total charge Q that is distrubted along the rod's length with linear charge...

Homework Statement A thin conducting disc has radius a thickness b and electrical resistivity ρ. It is placed in a uniform time-dependent magnetic induction ##B = B_0 sin ωt## directed parallel to the axis of the disc. Assuming that ρ is large, find E at a distance r < a from the axis of the...

The unit right now is electrostatics, but this question is really just vectors, nothing to do with charges or anything... anyways here is the info: 1. Homework Statement Three identical point charges, A, B, and C are located as shown here: The force A-on-C is the same as the force B-on-C...

Homework Statement An electric charge Q is uniformly distributed along a thin circular wire situated in the z = 0 plane at x2 + y2 = R2 . Determine the electrostatic potential at the point (0, 0, D). Homework EquationsThe Attempt at a Solution I figured the only components that mattered would...

Hi everyone, I am a little confused conceptually about electrostatic voltage and DC voltage. I did my bachelors in biochemistry (where I’m working today), I’m learning/relearning physics as a hobby. I did well in high school physics and first year physics but I’m afraid I’ve forgotten most of...

Homework Statement Imagine if you have two charged plates which have the same magnitude but opposite in charges. If you place an uncharged object near of the positive plate what will happen? Homework Equations I don't think it depends on equations The Attempt at a Solution Okay, so If you rub...

On calculating the electrostatic potential at a point due to charge q, by definition, it is the work done to bring a unit positive charge from infinity to that point. Trying to find it mathematically, it should be ∞→R ∫E.dr...

howdy, i am building an electrostatic seperator for plant material. the two materials i am trying to separate have a negative charge but one responds a lot more to positve charges so i feel there will still be sufficient seperation. i have the general plan for it done, i just had a few...

How can I find the electrostatic potential of any point on a charged disk with radius R and surface charge density σ

Homework Statement [/B] In a thin rectangular metallic strip a constant current I flows along the positive x-direction, as shown in the figure. The length, width and thickness of the strip are l,w and d, respectively. A uniform magnetic field B is applied on the strip along the positive...

Homework Statement A parallel plate capacitor having plates of area S and plate separation d, has capacitance C1 in air. When two dielectrics of different relative permittivities ( ε1=2 and ε2=4) are introduced between the two plates as shown in the figure, the capacitance becomes C2. the ratio...

Homework Statement I want to find the force on a positive charge placed at a distance ##d## from a positively charged infinite plate. Of course, it can be simply done by finding the electric field due to the plate using Gauss's Law. But my teacher suggested a different method and I am unable...

Dear Member, Respected Members, I am working on the behaviour of hydrogen at the Cu/Ni (111)-graphene interface. In case of Ni (111), the atomic H on the interface diffuse inside the the surface. While in case of Cu (111), the H atom stays at the Cu(111)-graphene interface. It seems that H...

Homework Statement This is problem 3.4 from Prucell and Morin if you have the book. Homework Equations None The Attempt at a Solution Electric field inside a conducting sphere is zero. Let P be a point on one of its equatorial plane. The field along the plane is zero. So I know the charge...

Homework Statement Consider the following pair of dipoles in one dimension. One of the dipoles: -ve dipole positioned at (-D/2, 0) and +ve (+D/2, 0), with the origin between them. Other dipole: -ve dipole positioned at (r-d/2, 0) and +ve at (r+d/2, 0), with (r, 0) being the centre. Show that...

Homework Statement In the figure below, a right triangle, determine the magnitudes of the a. Net e-field at p (assume a proton is placed at p) b. Net electrostatic force at P c. Net electrostatic potential at P let q = 1.70 x 10^-8, R = 78cm and P is halfway between Q1 and Q3 Red dot is P A^2...

I'm modelling a system with a nanosized semiconductor in 1d, inside which I want to find the electrostatic potential. Having found this I am unsure what boundary conditions to put on this, when it is connected to a metal on one side and to vacuum on the other. So far I have put that it is...

Homework Statement 2 concentric shells are placed with inner shell having charge q and outer charge -q, with radii a and b respectively. Homework Equations don't know The Attempt at a Solution the question asked me to find self energy of the 2 shells and interaction potential energy,i found...

Okay guys It's no wonder I love electrostatics I keep on getting so many doubts Okay my doubt goes like this Consider 2 charges(q1and q2 having masses m1and m2 (here i am assuming that these two aren't point charges and therefore don't have negligible volume/mass) Okay so i am neglecting the...

Could the orbit filling order of electrons be more classical and less quantum? I attached a jpeg and need someone to do a electrostatics analysis of the CAD model version of it. Does anyone have an electrostatics software package and have time to do a finite element analysis on a 3-D part to...

Homework Statement Using methods of Images, How do I find the potential of the system consisting of two conducting cylinders that are not grounded and separated at a distance of 2D, one in a potential of V_0 and the other is -V_0? Homework Equations The potential due to an infinite line...

1. The problem statement: In the figure four particles form a square with edge length a = 2.44 × 10-2 m. The charges are q1 = q4 = 1.06 × 10-15 C and q2 = q3 = q. What is q if the net electrostatic force on particle 1 is zero? All variables and given/known data: The given variable are in the...

Hi, two questions: Does the same energy put into an attraction force give the same force as a repulsion force? I am wondering if one is measuring slightly weaker than the other. ie. If I measure the positive/negative attraction force, is the positive/positive repulsion force as strong when...

i know that all conductors are equipotential,then how are charges flowing in a conductor?and at times in we say that charges won't flow since two points are equipotential(like in wheat stone bridge we say that charge won't flow across the capacitor/resistor since the ends of the 5th...

How to find electrostatic interaction energy between two uniformly charged conducting spheres /uniformly charged non conducting spheres or between a charge and uniformly charged spherical shell I mean what is general method of finding electrostatic energy in a given system.I don't have any...

in deriving the capacitance of a parallel plate capacitor why do we take the field between the capacitors as σ/∈ and not 2σ/∈,when there are two plates and in the region between the capacitors, field must add up so shouldn't it be 2σ/∈?

Homework Statement Please see this illustration http://www.physicsgalaxy.com/lectures/1/57/1006/Solved-Example-1#6 (see question only) Homework Equations potential due to a hollow sphere at it's centre = kq/rThe Attempt at a Solution here won't there be an induced positive charge on the outer...

Homework Statement Charge is distributed on the surface of a spherical balloon (an insulator). A point particle with charge q is inside. If polarization effects are negligible the electrical force on the particle q is greatest when: a. it is near the inside surface of the balloon b. it is at...