Electrostatic force Definition and 184 Threads

Hi! I have a high school physics question. I know the concept of induction, and I also know what happens when a dielectric slab is placed between 2 plates of a capacitor. 2 charged particles are kept at a distance r. The mutual force of attraction/repulsion is F. What happens to the force...

I have physics homework and came across this question : I was asked to find the electrostatic force between two charged particles each having a charge of +5.0x10-9 C and which were separated by a distance of 3cm. I found it to be 2.5x10-4 N.Then I was told to calculate the gravitational force...

Homework Statement Suppose that the magnitude of the net electrostatic force exerted on the point charge q2 in the figure is 0.65 N . (Figure 1) http://imgur.com/4lZliPq Find the distance D. q1 = 2.1 micro C q2 = 6.3 micro C q3 = -.89 micro C Homework Equations F = k |q1|...

Homework Statement Obtain an expression for the potiential energy between to particles in an ionic bond at radius r0 Homework Equations Coloumb's laws: F = (-k * q1 * q2)/r-1The Attempt at a Solution I think that if i do U = r0∫0 F(r)dr = [k * q1 * q2 * r-1]r00 = k * q1 * q2 * r0-1, Then that's...

I'm tasked to find the force one parallel plate exert on the other plate in a capacitor. somehow the force isn't just F=qE, where E=Q/2εA What am I missing here?

Homework Statement A 8.15 nC charge is located 1.95 m from a 4.18 nC point charge. (a) Find the magnitude of the electrostatic force that one charge exerts on the other. N (b) Is the force attractive or repulsive? Homework Equations The Attempt at a Solution Is there really a...

I'm curious about electron trapping by electrostatic force. A simple scenario can be ... A perforated, conductive, hollow sphere in a vacuum, connected to a negative high voltage source. I want to calculate how much electrons it can hold (total charge of it). The relation between sphere voltage...

Homework Statement Charge A is +2C and is located at <4,0,0> Charge B is +12.5C and is located at <0,-3,0> What is the the Force(AonB) What is the magnitude of F(AonB) Homework Equations F = (k)(Qa)(Qb)/(r^2) (r^) For reference the answers are < -0.8k, 0.6k, 0 > N (F...

Hello, Any help woould be wonderful! Identical point charges Q are placed at each of the four corners of a rectangle measuring 2.35 m by 3.05 m. If Q = 26.9 μC, what is the magnitude of the electrostatic force on anyone of the charges? i don't even know where to start... HELP!

Homework Statement I should derive \vec{F_{q}} = \frac{-q'^{2}}{4∏ \epsilon_{0}} \frac{r'/a}{(r'^{2} - a^{2})} \hat{r} from \vec{F_{q''q'}} = k\frac{q' q''}{\left|\vec{x'} - \vec{x''}\right|^{2}} Homework Equations The Attempt at a Solution I know that q'' = -q'...

Homework Statement 4 identical charges each equal to Q are placed at the 4 vertices of a regular triangular pyramid of each side equal to 'a'. Find the net electrostatic force on anyone charge. Homework Equations F = kQ^2/a^2 The Attempt at a Solution find the force due to each...

Homework Statement What is the angle θ between the electrostatic force on the charge at the origin and the positive x-axis? Answer in degrees as an angle between -180 degrees and 180 degrees measured from the positive x-axis, with counterclockwise positive. Coulomb constant is 8.98755e9...

Homework Statement 3 identical charges of 2.0 uC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin...

Homework Statement A particle with charge −8 μC is located on the x-axis at the point 8 cm, and a second particle with charge −6 μC is placed on the x-axis at −6 cm. What is the magnitude of the total electrostatic force on a third particle with charge −4 μC placed on the x-axis at −2...

Homework Statement Two engineering students, John with a mass of 90 kg and Mary with a mass of 45 kg, are 30 m apart. Suppose each has a 0.01% imbalance in the amount of positive and negative charge, with one student being positive and the other negative. Find the order of magnitude of the...

Hi All I'm a professional Electronics Engineer and very much an amateur physicist. I'm trying to find the force exerted between 2 parallel plates for a given plate voltage, separation, and plate area. I've found plenty of wiki's, google pages etc etc of force between 2 point charges...

Homework Statement How far apart must two electrons be placed on the Earth's surface for there to be an electrostatic force between them equal to the weight of one of the electrons? Homework Equations Fe = (1 / 4∏ε0) X (q1q2 / r^2) The Attempt at a Solution I set Fe = me-...

(please help-still not solved) electrostatic force lab debate For lab, we had to do the following experiment, and me and my friend are not agreeing as to whether we have correct data: We had to charge a ball, then while holding that ball, bring it to a similarly charged ball that was hanging...

Homework Statement At the point of fission, a nucleus with 98 protons is divided into two smaller spheres, each with 49 protons and a radius of 6.38x10^-15 m. What is the repulsive force pushing these two spheres apart Hint: d ≠ the radius Homework Equations F= k (q1q2/d^2) The...

I was watching a show the other night about the Large Hadron Collider, and I got to wondering how much force it would take to push two uranium nuclei right up against each other. I figured it would be on the order of a thousandth, maybe a millionth of a pound, which seems like a lot, considering...

At a certain distance from a point charge q there is small, dielectric ball. How would change the value of electrostatic force acting on the ball, if the value of a point charge would be doubled? According to F=k[(q1*q1)/r^2] there would be no force on the dielectric ball, because his resultant...

In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated at about 0.28 nm. Calculate the electrostatic force between the sodium ion and the chloride ion. What I...

Homework Statement An electric point charge of Q1 = 5.23 nC is placed at the origin of the real axis. Another point charge of Q2 = 1.89 nC is placed at a position of p = 2.63 m on the real axis. At which position can a third point charge of q = -2.62 nC be placed so that the net...

In the figure, the net electrostatic force on Q1 is zero. If Q1 = +4.99 nC, determine the magnitude of Qo. Qo = (r0/r1)^2 * abs(q)*2cos theta The figure is attached, please help, I'm so lost with physics II

Homework Statement A charge of 6.00 x 10-9C and a charge of -3.00 x 10-9C are separated by a distance of 60.0 cm. Find the position at which a third charge, of 12.0 x 10-9C, can be placed so that the net electrostatic force on it is zero. Homework Equations Coulomb's Law The...

Homework Statement In solid sodium chloride (table salt), chloride ions have one more electron than they have protons, and sodium ions have one more proton than they have electrons. These ions are separated by about 0.28 nm. Calculate the electrostatic force between a sodium ion and a chloride...

given to solid half charged sphere Insulators. In which state the mutual net force is bigger: A/B/the same

Homework Statement The problem is: If you have 2 rectangular plates 1cmx10cm each, which means that the area is A=10cm2=10-3m2for each plate; every plate holds a Constant positive charge of Q=+2x10-6C each; these plates are separated by a distance d=1cm=10-2m What is the electrostatic...

I have some problems withe this question: Two positively charged particles A and B of masses of mA and mB respectively are suspended by two insulating threads of the same length from O. Due to the electrostatic repulsive force between A and B, threads from AO and BO make 30 degrees and 60...

Homework Statement Compare gravitational, electrostatic and van der Waals forces between two 100nm polystyrene spheres which are separated by a) one micrometer b) one millimetre and c) one centimetre Homework Equations Gravitation and electrostatic equations are standard. The...

Homework Statement a) Calculate the electrostatic force on an uniformly charged rod of length 2L and charge q, which lies along the axis of an uniformly charged ring of radius R and charge q'. The centers of the charged rod and the rings are displaced at a distance z= z0. b)Show that if z0 >>...

Homework Statement Homework Equations F = k*Q1*Q2/r^2 The Attempt at a Solution My work is E(x) = (k*Q1)/(x^2) - (k*Q2)/((L-x)^2) Find derivative and set E(x) = 0. But I get a non real answer. Am I doing this completely wrong here? I was going to solve for x here.

Homework Statement Measurements show that a honeybee in active flight can acquire an electrostatic charge on the order of 90.9 pC. a)How many electrons much be transferred to produce this charge? Ne =5.67*10^8 b) Supposing two bees, both with this charge, are separated by a distance of 14 cm...

I am having trouble with this question and need some help please excuse any mispellings the question deals with three charges q1 q2 and q3 q=1.2*10^-5 q1=+q or 1.2*10^-5 q2=-2q or -2.4*10^-5 q3=+3q or 3.6*10^-5 q1 and q3 are exactly .32 meters apart and I need to find what...

Homework Statement Two small objects, A and B, are fixed in place and separated by 2.46 cm in a vacuum. Object A has a charge of +1.18C, and object B has a charge of -0.937C. How many electrons must be removed from A and put onto B to make the electrostatic force that acts on each object an...

Homework Statement Of the charge 'Q' initially on a tiny sphere, a portion q is to be transferred to a second, nearby sphere. Both spheres can be treated as particles. For what value of q/Q will the electrostatic force between the two spheres be maximized? The Attempt at a Solution The...

A proton is in a vacuum near the surface of Earth. Where should a second proton be placed so that the electrostatic force it exerts on the first proton balances the weight of the first proton? F = (k×Abs[q1]×Abs[q2]) / r^2 k = 8.99×10^9 Nm^2/C^2

Homework Statement During a collision between two initially uncharged polystyrene balls of radius 2 mm, some electrons are transferred from one of the balls to the other. In what direction does the resulting electrostatic force between the balls act? The magnitude of the force between the...

Homework Statement A mad scientist is designing a trap for intruders that will lift them up into the air and hold them helpless. The device consists of an equilateral triangle, 10.0 meters to a side, embedded in his floor. When he flips a switch, the corners of the triangle will be charged...

Homework Statement The attractive electrostatic force between the point charges 8.12×10−6C and Q has a magnitude of 0.670N when the separation between the charges is 7.26m. Find the sign and magnitude of the charge Q. (this is a direct cut and paste) Homework Equations...

Homework Statement Well we just learned about Coulomb's Law today but there is something that is bothering me. According to Coulomb's Law the magnitude of the force of attraction between a charged and neutral object is 0. However, the Law of Electrostatics states that a charged and neutral...

Your Open QuestionShow me another » How to increase electrostatic force? I am from grinding wheel industry, on one process grains are placed on the belt conveyor. Below this conveyor aluminum sheet is connected with 11 KV power supply. Then backing disc is brought near the conveyor. then...

Suppose we have three charged particles arranged in a line, the first one being negative, the second being positive, and the third being negative. If we want to find the net force on the third particle, we sum the force from the second particle on the third and the force from the first...

Assume that you have two protons accelerated in opposite directions within a cyclotron. As they approach the speed of light their masses increase. At what proportion of the speed of light will their gravitational attraction (due to their increased mass) equal their electrostatic repulsion ?

Homework Statement Identical isolated conducting spheres 1 and 2 have equal charges and are separated by a distance that is large compared with their diameters (Fig. 21-22a). The magnitude of the electrostatic force acting on sphere 2 due to sphere 1 is F = 6.5 N. Suppose now that a third...

Homework Statement How far must two protons be placed on the Earth’s surface for there to be an electrostatic force between them equal to the weight of one of the protons? Homework Equations The Attempt at a Solution

I am trying to calculate the forces in a system with a mix of conductive + dielectric components upon application of an AC potential. Frequencies are low enough that I need not consider magnetic field effects. I can solve equations to obtain the electric field, but at am a loss for force...

This is the problem: "Determine the ratio of the electrostatic force to the gravitational force between a proton and an electron, FE/FG. Furthermore, note the mass of an electron is 9.109 x 10^-31 kg and the mass of a proton is 1.672x10^-27 kg.G and K are constants." I'm not exactly sure what...

Hi, I'm trying to figure out what the electrostatic force between a curved beam (see picture attached) and a standard parallel plate electrode would be. I have an equation for the critical force to induce snapping between the bi-stable states of the beam, but I need to find out one for...

In a pith-ball electroscope, a ball made of pith, which is a light-weight electrical insulator, is suspended from a hook via a silk thread. When the electroscope is placed in the vicinity of a negatively charged object on the right, the ball moves towards the object. What is the direction of...