Coulomb's law Definition and 403 Threads

Homework Statement Homework Equations Ex=1/k*1/(a^2/2)*1/(sqrt2)*cos(theta)*(sum of charges) Ey=1/k*1/(a^2/2)*1/(sqrt2)*sin(theta)*(sum of charges) The Attempt at a Solution So first off I can see that I don't need to calculate the force in the x direction as each q cancels out when...

Hello everyone! I'm currently trying to calculate electric forces between two objects, so for that I of course need Coulomb's Law. I understood its equation (etc.), but there are 3 things that I haven't found out yet: -How exactly can you find out or calculate what amount of charge an object...

Homework Statement Three charges, q1, q2, and q3, lie in a plane, as shown below. Find the net force on charge q2 (please refer to attachment for diagram) Homework Equations F= k x q1q2/R^2, knowledge of trig functions and separating x and y components The Attempt at a Solution So I found the...

sorry I have use the image I made. Since I don't know how to perform the formula on forum :( This is the problem I am having.

I am trying to measure the charge(or voltage) of a positively charged sphere by touching it with a non- calibrated electroscope. I am getting consistent results in the separation(or angle) between the metal leaves, but I don´t know how to calculate the voltage between the leaves from there. I...

Despite some effort I still don't understand how Coulombs law can be used for experimental search for mass of photon. From wikipedia: If a photon did have non-zero mass, there would be other effects as well. Coulomb's law would be modified and the electromagnetic field would have an extra...

Homework Statement I just wanted to make sure I understood the difference between the two. Coulombs law is the force between two charges. Two charges that are physical(maybe not the right word) located on some axes. We can use the equation F=k(q1 * q2 * r(hat))/r^2 r^2=|r| = |x-x'| where r hat...

According to Coulomb's law, the electric force between two, equal in magnitude and opposite in direction, charges depends on the distance between them, and as they get close to each other, the force increases and the distance decreases. At the position when they get stuck with each other, the...

Let's say you have two particles that are the same in magnitude but have opposite charges like the equation down below: E1 = -q*k/r^2 E2 = q*k/r^2 ETotal = q*k/r^2 + -q*k/r^2 = 0 Does this mean that the electric field of both these charges cancel out each other? Then what is the electric...

and two -q charges aligned along the x-axis as follows... -q__________q__________-q <--- the space between them being d a) Suppose the +q charge is displaced perpendicularly by a small vertical distance dy. What is the total force F acting on it? Taylor expand your answer to leading order in...

Homework Statement http://imgur.com/48cLE6q Homework Equations Coulomb's law The Attempt at a Solution I can follow most of this problem, but I am unsure where the constants in front of the trig functions are coming from. Why is it 2cos(135), 1cos(45), 2cos(-45), etc?

Homework Statement Hello, Two 10-cm-diameter charged rings face each other, 20 cm apart. The left ring is charged to -22 nC and the right ring is charged to +22 nC . What is the magnitude of the electric field E⃗ at the midpoint between the two rings? Homework Equations [/B] E = Kq/r^2 K =...

Homework Statement Hi Members, I have solved an equation involving Coulomb's law in two ways and have posted the images of the same. I get two types of equations. Please help me to find where i gone wrong? Homework EquationsThe Attempt at a Solution

Hello, I am pretty new to physics. I have no formal education on physics, and I have been studying it on my own out of curiosity and fascination. Please correct me if anything that I say is wrong and assume I know nothing. Math is also not my strongest skill, but I am trying to become better...

Homework Statement Using direct integration, compute the electric field at the point (0,0,Z) of a semi-espherical (z > 0) charge distribution of radius R < Z and density ##\rho=constant## having a spherical hole of radius ##r_h<R## centered at (0,0,##r_h##). Homework Equations Coulomb's law...

Homework Statement We know that coulomb's law describes the force between two charged bodies as proportional to the magnitudes of the charges and inversely proportional to the square of the distance. Of course, like charges repel and unlike attract. Now theoretically, if we placed two...

I just need to know what I am being asked for here, I don't recall seeing this symbol before. Is this net force?

Homework Statement Please refer to the image; problem-1. My theory is that there are two spheres 'A' and 'B', where 'A' is (partially and primarily) positively charged, and 'B' is (partially and primarily) negatively charged. The magnitude of negative charge is greater than the positive charge...

The power law of Coulomb depends on the dimension treated . It is $$1/r^{n-1} $$ where n is the dimension. In n=3 we get the inverse square law. How does this go into considering now spacetime 3+1 dimensional ? Would it modify the law and how ?

Homework Statement In the figure particles 1 and 2 of charge q1 = q2 = +24.00 × 10-19 C are on a y axis at distance d = 18.0 cm from the origin. Particle 3 of charge q3 = +17.60 × 10-19 C is moved gradually along the x axis from x = 0 to x = +6.47 m. At what values of x will the magnitude of...

I read the Coulomb's first memoir on Electricity and Magnetism (Louis L. Bucciarelli english translated version), and found it to contain only three trials (as complained by many) to reach the conclusion of a 1/r2 equation for the force. And many seems to have also complained for not having able...

Hello. I am an intro Physics student and this is my first post here. In Coulomb's law the charges are said to be stationary. I need some clarification about what does it mean for two charges to be stationary: A. Does it mean that the charges are not moving with respect to each other? (But...

- What are the units of P1 and P2 in Coulomb's law for magnetic poles? (picture attached). - What is the accurate name of 'P' : magnetic pole strength? Magnetic pole intensity? PS: Sorry if my questions are too basic for this forum- I am not a Physicist.

Homework Statement A big metal sphere has radius ##r## and charge ##Q##. The distance between a certain point charge and the surface of the sphere is equal to ##s##. The magnitude of the force exerted on the point charge is inversely proportional to: A) ##s^2## B) ##r^2## C) ##(s+r)^2##...

I am not getting the answer to this question as shown in the textbook. Please help...! My attempt is in the last attachment. Thanks.!

Homework Statement A small ball has been loaded so that its charge is -2.6 nC. Another similar ball has the charge +1.2 nC. The balls are located at the distance 2.5 cm from each other . With how much force do the balls attracts each other? Homework Equations F = k * (Q1 * Q2)/r2 The...

Hello, I have a question about the interaction between particles. Maybe it's a simple question, but it's bothering me. Consider Coulomb's law. From Wikipedia we have a simple definition to illustrate: "The magnitude of the electrostatic force of interaction between two point charges is directly...

1. The problem statement, all variables and given/known }data The picture I drew is quite sad but it's the best I could do lol. I forgot to mention in the image that it's the magnitude of the net force we're looking for. Homework Equations...

Homework Statement The charge on two pith balls can be calculated by knowing their masses and observing the angle of separation between the balls. If both balls are equally charged and they are suspended by strings that are 1.0 m long, calculate that charge. Homework Equations F = k q Q /...

Why is there no Coulomb's Law for the electric displacement?

Homework Statement Hi all, I have this quiz on MasteringPhysics, but I can't seem to get the right answer.[/B] Consider two positively charged particles, one of charge q0 (particle 0) fixed at the origin, and another of charge q1 (particle 1) fixed on the y-axis at (0,d1,0). What is the net...

Homework Statement A thin sheet in the shape of an annular semicircle has a positive surface charge density +σ as shown. What is the electric field at point P? Here is an illustration of the problem: http://postimg.org/image/630bpqwan/Homework Equations Gauss's Law: φ=Qenclosed/ε0 φ=∫E⋅dA...

I will like to know how to approach to this problem: Over the x-axis is Q1=60μC Q2=-80.0μC the separation between them is 50.0cm. There is a point A on the y-axis 40.0 cm above Q1, and a point B 40.0cm above Q2. I want to know how to approach to find the direction and magnitude of the Net...

Given that (a) the electrostatic force is inversely proportional to r2 (b) that the electron is (when it is determined) a point (c) that the repulsion for an electron to itself is therefore r=0 (d) that r=0 would naively end up with infinite force What is the way out of this problem? Thanks

1.An electric charge q1 (-e) is located at the origin. A second electric charge q2 (-4e) is located at a distance d from the origin on the x-axis. A third charge q3 (+e) is located a distance x, which is less than d, on the x-axis between q1 and q2. In terms of d, what is the distance x where...

m*a=k*Q1*Q2/r equalizing Newton's first law and coulomb's force to get acceleration of the specific charged body.

Homework Statement What is E in Magnitude and Direction at the center of the square of (fig. 3-7). Assume that q = 10x10-8 C and a = 5 cm Now I have am not well versed with vectors, I don't like them and they don't like me. I can not figure out the directions the magnitudes move in.Homework...

Homework Statement This problem is taken from 'Introduction to Electrodynamics' by David Griffiths. (a) Twelve equal charges, ##q##, are situated at the corners of a regular 12-sided polygon (for instance, one on each numeral of a clock face). What is the net force on a test charge Q at the...

I've attached my workings... But is this correct? I can't see the fault with it. However I can't see how there will be no y-component to the force... Can someone a bit smarter than me tell me if I'm being really dim. https://flic.kr/p/sutQu4][/PLAIN]

Sorry for the brevity of the post, but eloquence has never been my strong point. Here's my question: In a proton-surfeited atom, a proton captures an electron to form a neutron. Now, according to Coulomb's law, the magnitude of the electrostatic force field is equal to (kq1q2)/d2, where k is...

Examine the charge distribution shown: b) What is the net electric field acting on charge 1? Attempt at the answer: E2 = Kq2/r2^2 = (9.0 x 10^9 Nm^2/C^2)(3.0 x 10^-5 C) / 2.0m^2 E2 = 6.75 x 10^4 N/C E2 = E3 ( therefore, same procedure) eNet = Sqr.rt. 6.75 x 10^4 N/C^2 + 6.75 x 10^4 N/C^2...

Homework Statement In science class, we are supposed to explain how a generator works and functions. However, we have to incorporate coulomb's law in our explanation. Homework Equations F=kQ1Q2/r^2<-- coulomb's law The Attempt at a Solution How I understood it was that a generator consists of...

We are doing an experiment to verify coulomb's law, and we are currently using a stable voltage source. However, we were assigned to do it using static electricity, and we were wondering how to establish inverse r^2 dependence if the amount of the charge on the ball isn't the same every time we...

Homework Statement Consider a parallel universe where the laws of nature as we know them are different, and aqueous solutions can have an excess charge. Two beakers are separated 1.20 meters and each contains 0.300 L of an aqueous solution of 6.40 × 10-6 M excess charge. One beaker has a net...

Homework Statement Examine the charge distribution shown. a) Find the net force on charge 1 b) What is the net electric field acting on charge 1 (Haven't gotten to this yet. I know I won't be given the answer, however, even a hint on building intuition would be appreciated) I've plugged my...

Homework Statement http://i.imgur.com/Ypqcw19.png Homework Equations N/A The Attempt at a Solution Since the reaction involves the breaking of bonds in MCO3, I assume we are looking at coulomb interactions. I'd think the answer is D) BaCO3 because all the options have a 2+ charge, but barium...

Homework Statement It is the last part, part (c) that I'm having trouble with, but I'll post the entire question for clarity. Three charges (q) form the vertices of an equilateral triangle. A fourth charge Q ( Q = -q ) is placed at the center of the triangle. (a) will the charges at the...

Homework Statement Homework Equations Coulomb's law : F=q1q2/4πεr2 where ε=εoK The Attempt at a Solution Suppose there is a dielectric slab of thickness 't' and dielectric constant 'K' inserted between the charges separated by a distance 'r' ,then if we convert the slab thickness to its...

What would be the easiest way to describe the similarities and differences between the two laws, other than the fact that their formulas are built similarly and they use different measurements. Any input would be great; I am currently having a brain block! Coulombs Law:F=K (q1*q2)/r^2 Newtons...

Homework Statement Two identical conducting spheres of charges 3q and -q attract each other with a force of 36 x 10-3N. When they are separated by a distance of 0.2 m. The spheres are brought into contact with each other and then separated by a distance of 0.1 m. What is the magnitude of the...