Electric force Definition and 247 Threads

Homework Statement Two objects are identical and small enough that their sizes can be ignored relative to the distance between them, which is 0.296 m. In a vacuum, each object carries a different charge, and they attract each other with a force of 1.80 N. The objects are brought into contact...

Homework Statement A 14.5 cm-radius thin ring carries a uniformly distributed 13.6 uC\ charge. A small 6.1 g sphere with a charge of 5.0 uC is placed exactly at the center of the ring and given a very small push so it moves along the ring axis (+ x axis). How fast will the sphere be moving...

Homework Statement The electric field between the plates of a parallel-plate capacitor is horizontal, uniform and has a magnitude E. A small object with a charge of -2.60 µC is attached to the string. Assume that the tension in the string is 0.350 N, and the angle it makes with the vertical...

Homework Statement A ring with a 15cm radius and with a uniform charge of 20 micro coulombs is in the yz-plane with the origin at its center. What is the force on a -3 micro coulombs charge on the x-axis at x=5cm? Homework Equations E=kQx/(R^2 + x^2)^(3/2) F=QE The Attempt at a...

Homework Statement Charge Q is on the y-axis a distance a from the origin and charge q is on the x-axis a distance d from the origin. What is the value of d for which the x component of the force on q is the greatest? Homework Equations The Attempt at a Solution

Our professor said that when a metallic body or a conductor is inserted inside a gaussian sphere, it will not experience anykind of electric force? But i don't understand why? Any help will be appreciable.

Homework Statement The structure of NH3 the molecule is approximately that of an equilateral tetrahedron, with three H+ ions forming the base and an N3− ion at the apex of the tetrahedron. The length of each side is 1.64 10-10 m. Calculate the magnitude of the electric force that acts on...

Homework Statement Two identical spheres with mass m are hung from silk thread with length L. Each sphere has the same charge, so q1=q2=q. The radius of each sphere is very small compared to the distance between the two spheres, so they may be treated as point charges. Show that if the angle...

Ok, so here's the question. I've pretty much got it except I'm having trouble with one part of constructing the integral. The problem is... An insulator which lies between the positions -d\hat{z} and d\hat{z} has a nonuniform linear charge density \lambda = \lambda_{o}\frac{z}{d} . Find the...

Homework Statement 002 (part 1 of 2) 2.0 points Two identical conducting spheres are placed with their centers 0.3 m apart. One is given a charge of +1.3 × 10^−8 C and the other a charge of 1 × 10^−9 C. Find the electric force exerted on one sphere by the other. The value of the Coulomb...

Homework Statement In the Bohr model of a hydrogen atom, what is the magnitude of the electric force exerted between the proton and the electron when the electron is in the n = 1 state? Homework Equations E= - 13.6 eV/ n^2 The Attempt at a Solution I simply...

Homework Statement http://img682.imageshack.us/img682/985/physicscharge.png Homework Equations The Attempt at a Solution http://img682.imageshack.us/img682/4295/eqn.png Is it the first one or the 2nd one? Is my basic concept right in the first place?

I just used some species in a salsa for a couscous. The species were in powder form. When I put them in contact with the water of the salsa, they spread over a large part of the water' surface. It reminded me the electrons of a negatively charged conductor. Whatever was the spice, the effect...

Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.200 and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0 with the vertical, as shown in the figure...

Homework Statement Three positive charges are located in the x-y plane (see plot below), with Q1=3.10 μC, Q2=5.20 μC and Q3=6.30 μC. Note that the charges are located at grid intersections, and that the x and y coordinates are in cm. dynamically generated plot A. Calculate the magnitude of...

Homework Statement (I'll be using k=1/4pi*permittivity of free space) Find the net force that the southern hemisphere of a uniformly charged sphere exerts on the northern hemisphere. Express the answer in terms of the radius R and the total charge Q. I tried to show how I attempted the...

Homework Statement Object I has a charge of + 3 x 10^6 coulomb and a mass of 0.0025 kilogram. a. What is the electric potential at point P, 0.30 meter from object I ? Object II, of the same mass as object I, but having a charge of + 1 x 10^6 coulomb, is brought from infinity to point...

Homework Statement Three positive point charges are arranged in a triangular pattern in a plane, as shown below. The Coulomb constant is 8.98755 × 109 N · m2/C2. Find the magnitude of the net electric force on the 2 nC charge. Answer in units of N. Homework Equations Fe = (kq1q2) / (d2)...

[b]1. A proton has a mass 1.7x10^-27 kg and its speed is v=.969c. When an electric force acts on the proton and does 5.8x10^-9 J of work on the particle, what are the following values? A) Particle energy B) Particle Rest Energy C) Particle Momentum D) Particle Beta [b]2. Particle...

a simple atom is comprised of one electron and one proton, with a distance of R=0.5*10-10m between them 1) what is the electric force between them F=K(qq)/r2 = 28.8N ------------------------------ 2)how much smaller than the electric force is: a) the gravitational force of the...

Homework Statement A +2.0-nC charge is at the origin and a -4.0-nC charge is at x = 1.0-cm. At what x-coordinate could you place a proton so that is would experience no net force? [NOTE by me] I put q1 as the positive charge (+2.0nC) and q2 as the negative charge (-4.0nC). q0, of course...

Homework Statement How many electrons must be removed from each two of 5.81kg copper spheres to make the electric force of repulsion between them equal to the magnitude to the gravitational attraction between them Homework Equations F: Ke (q1)(q2)/r^2 The Attempt at a Solution (...

Homework Statement An electron is released a short distance above Earth's surface. A 2ndelectron directly below it excerts an electrostatic force on the 1st electron just great enough to cancel the gravitational force on it How far below the 1st electron is the 2nd? Homework Equations...

Homework Statement An electron is projected with an initial velocity of 1.6x10^{6} m/s. If the electron just misses the upper plate as it emerges from the field, find the speed of the electron as it emerges from the field? Homework Equations Electric force equation The Attempt...

1. An object with a charge of -3.6uC and a mass of .012kg experiences an upward electric force, due to a uniform electric field, equal in magnitude to its weight. (a) Find the direction and magnitude of the electric field. (b) If the electric charge on the object is doubled while its mass...

Homework Statement Two point charges, Q1 = -6.9 µC and Q2 = 1.1 µC are located between two oppositely charged parallel plates, as shown in Fig. 16-65. The two charges are separated by a distance of x = 0.38 m. Assume that the electric field produced by the charged plates is uniform and equal...

Homework Statement What is the electric field at location of charge q Homework Equations The Attempt at a Solution My intuition in solving this is by finding the field of each charges relative to q and add them all, so for example for the 2q charges relative to q, the...

Homework Statement What are the magnitude and direction of the electric force on the +2.0x10^-6 charge shown in the diagram (included in the attachment)? Homework Equations F = kq1q2/r^2 The Attempt at a Solution I used the Ep = kq1q2/r^2 equation and plugged in the numbers but...

I have a question about whether a conductive wire is under any electric force if placed in a electric field. The setup is as following. A metallic needle is placed above a grounded metal plate at a distance of 100mm. the diameter of the needle is about 1mm, the length is about 20mm. The...

Two point charges of -1.0 micro C and +1.0 micro C are fixed at opposite ends of a meterstick. Where could a) a free electron and b) a free proton be in electrostatic equilibrium? I'm guessing the answer is nowhere since there have to be opposite charges to be in equilibrium?

Homework Statement Three positive point charges are arranged in a triangular pattern in a plane, as shown below. The Coulomb constant is 8.98755*10^9 N · m^2/C^2. http://img150.imageshack.us/img150/1052/electricforceproblemqp7.th.jpg http://g.imageshack.us/thpix.php Find the magnitude...

Homework Statement Particle B, with positive charge q_a, fixed in the yz-plane at (0,d_2,d_2). What is the net force F on particle A (positive) due to this charge? Express your answer (a vector) using k, q_0, q_3, d_2, x hat, y hat, and z hat. Include only the force caused by particle B...

Homework Statement Particle 0 experiences a repulsion from particle 1 and an attraction toward particle 2. For certain values of d_1 and d_2, the repulsion and attraction should balance each other, resulting in no net force. For what ratio d_1/d_2 is there no net force on particle 0...

Homework Statement Three charges are arranged as shown in the picture above. Find the magnitude and direction of the electrostatic force on the 6 nC charge. The direction I am looking for is the angle that the resultant force makes with the positive x-axis. Do not include units for the...

Homework Statement Two small spheres with mass m = 14.3 are hung by silk threads of length L = 1.26 from a common point. When the spheres are given equal charges, so that , each thread hangs at an angle \theta = 22.0 from the vertical. A. Draw a diagram showing forces on the left...

Two positive charges q0 at the origin and q1 at (0,d1,0) and one negative charge -q2 at (0,d2,0). A positively charged particle, q3 at (0,d2,d2) is added. What is the net force on particle 0 due to particle 3? (See Picture CPartD) F on 0 due to 3=kq0q3/r^2 where r would be the distance from...

Homework Statement Two small charges q1 = +2.65 nC and q2=-4.75nC are at a certain distance from each other. Q1 is affected by a force of 55μN from q2. a) how large is the force on q2? Draw a figure that shows the electric forces that work on q1 and q2. b) determine the distance between the...

Electric force question help please! I was just doing a question in my textbook and I got stuck on this question as my answer is no where near the given answer. Two charges of magnitude 0.24 μC and 0.29 μC are in a liquid dielectric with dielectric constant κ = 2.0. The charges are separated...

Homework Statement A plastic sphere with a positive charge of 4.8 x 10^-19 C is held stationary in a gravitational field of strength 9.8 m/s^2 by an electric field of strength 1.2 x 10^5 N/C. What is the force of gravity on the sphere? Homework Equations F_e=qE=kQq/r^2...

Homework Statement What is the electric force between a glass ball with 3.5 µC of charge and a rubber ball with -5.0 µC of charge when they are separated by 5 cm? Homework Equations Colombs Law: F(electric)=K((q(1)*q(2))/r^2) K=8.99E9 The Attempt at a Solution This seems like a...

Homework Statement A Van de Graaff generator is charged so that the electric field exerted at the top surface is 2.0× 10^6 N/C directed upwards. Find the a) the electric force exerted on a styrofoam peanut (q= 0.025μC) released at its surface, b) the gravitational force on the peanut, c) its...

Homework Statement An electron is released above the Earth's surface. A second electron directly below it exerts just enough of an electric force on the first electron to cancel the gravitational force on it. Find the distance between the two electrons. Homework Equations The...

Electric force angles problem :( Homework Statement Three positive particles of charges 11.0 µC are located at the corners of an equilateral triangle of side d = 14.0 cm (Fig. 16-38). Calculate the magnitude and direction of the net force on each particle. Fig. 16-38 Homework Equations F =...

Homework Statement Four point charges are placed at the four corners of a square. Each side of the square has a length L. Find the magnitude of the electric force on q2 due to all three charges q1 , q2 , q3 and q4. Given L=1 and q= 1.38 μC. Answer in N...

[SOLVED] Electric force and charge Homework Statement A positive charge of 2.90 μC is at rest at the origin. An electric force of 65.5 x 10-6 N acts on the charge as shown in the figure below. What is the x-component of the electric field at the origin? Homework Equations F=kQ/r^2...

[SOLVED] using electric force to calculate number of protons Homework Statement a hydrogen nucleus and a nucleus of an unknown atom are stationary, 5.0x10^-10m apart, the electric charge on the hydrogen nucleus is 1.6x10^-19C. express the charge you have calculated for the unknown nucleus...

Dear experts, Please guide me along with this problem. Two identical small conducting spheres are separated by 0.60 m. The spheres carry different amounts of charge and each sphere experiences an attractive electric force of 10.8 N. The total charge on the two spheres is −24 μC. The two...

- the electric force is inversely proportional to the square of the separation r between the particles and directed along the line joining them. - is proportional to the product of the charges q1 and q2 on the two particles. i don't understand wut does that mean, can someone please...

Homework Statement Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. You decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire. When you let go, the electric force...

[SOLVED] Electric Force Question The distance between neighboring singly charged sodium and chloride ions in crystals of table salt (NaCl) is 2.82 x 10^-10 m. What is the attractive electric force between the ions? By coulomb’s law, Electric force F = [1/4πεo] q1 q2/ r^2 = 9.0 x...