Charged particles Definition and 186 Threads

In physics, a charged particle is a particle with an electric charge. It may be an ion, such as a molecule or atom with a surplus or deficit of electrons relative to protons. It can also be an electron or a proton, or another elementary particle, which are all believed to have the same charge (except antimatter). Another charged particle may be an atomic nucleus devoid of electrons, such as an alpha particle.
A plasma is a collection of charged particles, atomic nuclei and separated electrons, but can also be a gas containing a significant proportion of charged particles.

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  1. G

    Gravitational waves, electromagntic waves and charged particles

    Hi all, I am trying to out what happens when a gravitational wave caused by a monochromatic, electromagnetic plane wave interacts with a charged particle. As we all know, the electromagnetic wave causes the particle to follow a figure of eight shaped path (in the particles rest frame anyway)...
  2. M

    Work required to assemble eight identical charged particles

    1. How much work is required to assemble eight identical charged particles, each with charge q, at the corners of a cube of side a? Explain, based on your answer, whether or not this configuration is stable.
  3. S

    Magnetic fields and charged particles

    It has been stated that a charged particle in the vicinity of a magnetic field experiences a force given by F = qV x B, which states that there is no force when its velocity is zero. It also shows that only the particles direction can be changed, not its kinetic energy. My question is this...
  4. N

    Charged particles in parallel magnetic fields

    If a charged particle passes through a magnetic field it will be deflected according to the right hand rule, i.e. VxB. What if the magnetic field lines are parallel to the velocity of the particle? Will the particle still be deflected?
  5. Z

    Pair of moving charged particles

    A positron and an electron are simultaneously fired from paralle particle accelerators a distance d apart, with equal velocity v. One calculation says that each one will, being a moving charged particle, induce a magnetic field B=\frac{\mu_0 q v}{4\pi d^2} and since the other is moving in...
  6. L

    Forces between charged particles, energy is coming from nowhere?

    So I've created a program in C# with the XNA libraries which is meant to simulate motion between charged particles. I drew a pic to show the problem I'm having and how I'm moving the particle.
  7. Sigurdsson

    Mobility of charged particles in classical gas

    This is problem 9.2 in solid state physics by Ibach and Luth. Homework Statement Using the stationary Boltzmann equation, show that the mobility of the charged particles in a classical gas is given by \mu = \frac{e \langle v^2 \tau(\mathbf{k}) \rangle}{m \langle v^2 \rangle}...
  8. D

    Charged particles deflecting in a statics question.

    [SOLVED] Charged particles deflecting in a statics question. Homework Statement A particle mass 2g and carrying a charge of q is suspended from a light, insulating thread. A second particle carrying an equal and opposite charge is held near to the first particle in the same horizontal plane...
  9. R

    Accelerating charged particles

    They say accelerating charged particles emit electromagnetic radiation(emr). Ok. Take a mass m, apply a force F on it and it will cause acceleration. All the energy i apply on m will go to its kinetic energy, so conservation of energy is obtained. Now take a charged particle p, apply force f and...
  10. J

    How Does Sphere 3 Affect the Electrostatic Force on Sphere 2?

    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...
  11. O

    How to determine the charged particles between a distance?

    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...
  12. A

    Can massless charged particles exist in nature?

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

    Stability of 4 Charged Particles at Square Corners

    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...
  14. M

    Calculating Tension and Charge Magnitude in Charged Particle Systems

    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...
  15. G

    Attraction of two charged particles

    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...
  16. D

    Four Charged Particles in a Square

    Homework Statement In the figure below, four particles form a square. The charges are q1 = +Q, q2 = q3 = q, and q4 = -5.25Q. What is q/Q if the net electrostatic force on particle 1 is zero? Homework Equations F=k|q1||q2|/r2 a2+b2=c2 The Attempt at a Solution I first drew a free...
  17. I

    Potential Energy system of 3 charged particles

    I simply can't wrap my head around a test question I received. I'll relate it as best as I can remember: "A system of 3 charged particles are arranged such that the total potential energy of the system is -200 J. Then, consider the same 3 particles, arranged so that the potential energy of the...
  18. Drakkith

    Confining Charged Particles with Alternating Electrostatic Fields

    Is it possible to use an alternating/rotating electrostatic method to confine charged particles? For example, if you want to confine electrons inside a cube, could you use a negative charge that is alternated between each side at a time, on a timescale of nanoseconds between each alternation?
  19. Z

    Diverting a beam of charged particles using M.F.

    Homework Statement A beam of charged particles of K.E. = 1keV and q=1.6 x 10-19 C and 2 masses 8 x 10-22kg and 16 x 10-27kg come out of an accelerator tube and strike a plate at a distance of 1cm from the end of the tube, where the particles emerge perpendicularly. Find the value of the...
  20. A

    Solving the Charged Particles Homework Statement

    Homework Statement Given three equal(1,2,3) (negative) charged particles , forming a circle ; and a charged particle on the center of the circle(#4). 360/3 = 120 . The angle between the charged particles are 120 degrees. Homework Equations 1) First Case : Find the resultant force...
  21. O

    Net Electric Field of 2 charged particles fixed to X-axis

    2 Particles are fixed to an x-axis: q1=2.1*10^-8 C @ x=.2m q2=-4.00q1 @ x=.7m We are trying to find the coordinate on the x-axis where the net electric field produced by the particles = 0. The equation I have is E=((8.99*10^9)q)/r^2 I got what i thought was q2 first, by multiplying...
  22. A

    Convection of charged particles in oil subject to DC bias

    Hi all, I have recently observed a very strange thing (or rather, I shall say unexpected phenomenon). When I deposited some charged micro-particles between 2 electrodes (vertical plates) with a DC bias in hexadecane oil, I expected the negatively charged particles to go to the positive...
  23. R

    Charged particles and cylindrical coordinate system

    A charged particle in a magnetic field is spiralling along a path defined in cylindrical coordinates by r = 1 m and θ = 2z rad (where z is in meters). The speed along the path is constant at 3.87 km/s. What is the z-component of the velocity, vz, in cylindrical coordinates? My attempt...
  24. S

    Charged Particles in Electric and magnetic fields

    Homework Statement An electron, initially at rest, is accelerated through a potential diff of 15.0 kv. It is then allowed to circulate at right angles to a uniform magnetic field of strength 2.35 T. Calculate the electrons final speed before entering the magnetic field. Homework...
  25. I

    Show that the total energy of a system of charged particles is conserved

    Homework Statement We have a system with N particles with masses m1, m2, ... mN and electrical charges q1, q2, .. qN that interact electrostatically. We assume these interactions are instantaneous. Construct the formula for the total energy and show that this is conserved. The Attempt at a...
  26. L

    How can charged particles be deflected by both magnetic and electric fields?

    Homework Statement 1) Calculate the value of B_z needed for an electron with a speed of 6X10^5 m/s to be deflected to the right in acirle of radius 3cm. 2) Calculate the value of E_x needed for an alpha particle with a speed of 6X10^5 m/s to be deflected to the right in a circle of...
  27. S

    Charged Particles Moving in a Magnetic Field Ranking Task

    Homework Statement Five equal-mass particles (A–E) enter a region of uniform magnetic field directed into the page. They follow the trajectories illustrated in the figure. Homework Equations The Attempt at a Solution i used the formula v=qBr/m got the following "A,B,C=E,D"...
  28. E

    How Does Charge -Q Exhibit Simple Harmonic Motion?

    Homework Statement Two identical particles, each having charge +q, are fixed in space and separated by a distance d. A third particle with charge -Q is free to move and lies initially at rest on the perpendicular bisector of the two fixed charges a distance x from the midpoint between the...
  29. O

    Attraction of two charged particles

    I was thinking about this problem today: You have two nearly identical charged particles, except that one has a charge of +1 C and the other has a charge of -1 C. If you place them at rest one meter apart, how long will it take for them to collide, and what will be their velocities when they...
  30. L

    How Does a Charged Particle Move Between Oppositely Charged Plates?

    Homework Statement Two horizontal metal plates, each 100 mm square, are aligned 10 mm apart, with one above the other. They are given equal-magnitude charges of opposite sign so that a uniform downward electric field of 2000 N/C exists in the region between them. A particle of mass 2.00 X...
  31. K

    Maximum velocity of charged particles

    Homework Statement A particle, with a charge +q and a mass, m, is inserted into an evacuated chamber. The chamber is placed between two parallel metal plates that are a distance d apart, and are connectd to the terminals of a power supply that provide V volts (one plate to the positive...
  32. E

    Impossibility of self constrained system of charged particles

    Hi everyone, I remember reading there is a theoretical argument that said its absolutely impossible for systems of charged particles (plasma) to cobble together without external field. But I don't remember the name of the theorem. Can anyone name it? Or even better point me to some nice...
  33. D

    Magnitude and Direction of Charged Particles

    Homework Statement Three charged particles are placed at the corners of an equilateral triangle of side 1.20 m. http://i565.photobucket.com/albums/ss99/dmullin4/HomeworkCH21P13.jpg The charges are +7.0 microcoulombs, -8.0 microcoulombs, and -6.0 microcoulombs. Calculate the magnitude and...
  34. T

    Coulomb's Law: Calculating Force on Charged Particles

    Homework Statement A charged particle A exerts a force of 2.62 micro Newtons to the right on charged particle B when the particles are 13.7 mm apart. Particle B moves straight away from A to make the distance between them 17.7 mm. What vector force does it exert on A? using coulombs law...
  35. M

    Dynamics of charged particles and quantum effects

    Why do we not consider quantum effects when we deal with motion of electrons in a Cathode Ray Oscilloscope, or in a cyclotron? We derive various relations using classical physics which turn out to be quite accurate in the laboratory.How is this possible when it is expressly known that classical...
  36. K

    Electric field of charged particles problem

    Homework Statement Two 9.00 µC charged particles are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 m. (a) Determine the electric field on the y-axis at y = 0.900 m. (b) Calculate the electric force on a -3.00 µC charge placed on the y-axis at y = 0.900 m...
  37. E

    Magnetic Forces on Charged Particles

    Homework Statement A particle with a charge of +8.4 µC and a speed of 55 m/s enters a uniform magnetic field whose magnitude is 0.30 T. For each of the cases in the drawing, find the magnitude and direction of the magnetic force on the particle. Homework Equations B = F /...
  38. P

    Charged Particles on a pendulum

    Homework Statement What is the distance(d) separating the charged particles dangling on the pendulum? Length of Nonconducting string=120cm mass of particles= 10g Charge q = 1.2*10^-8 Homework Equations Fe=(k*q^2)/d^2 The Attempt at a Solution I think I could get this...
  39. N

    Two charged particles moving towards each other

    Homework Statement Two protons are moving directly towards each other. When they are very far apart, their initial speeds are 1.5 x 10^6 m/s. What is the distance of closest approach? Homework Equations The Attempt at a Solution I know how to do this problem when one of the...
  40. P

    Electric fields created by charged particles

    Homework Statement At a particular moment, three small charged balls, one negative and two positive,are located as shown in Figure 13.46. Q1 = 1 nC, Q2 = 5 nC, and Q3 = -2 nC. Remember that you must first convert all quantities to S.I. units. 1 nC = 1 nanocoulomb = 1e-9 C. (a1)...
  41. S

    Oscillation in Charged Particles

    What causes EM radiation?? the answer is in the oscillation of charged particles, but why or how does that produce electromagnetic radiation? How does the fluctuations in the electromagnetic fields cause release of virtual phtotns, or does it, and other EM radiation?? please help me through...
  42. B

    Solving Electromagnetism Questions: Charged Particles

    I'm hating Electromag as of late. To the extent I can't even understand these 'simplest' of questions. I don't want anyone to be doing my work for me as nothing is essentially accomplished that way. If someone could head me in the right direction with these questions, I'd be most grateful...
  43. S

    Are There Any Massless Charged Particles and How is Particle Charge Calculated?

    I have the below doubts related to charge and mass.. Why charge always comes with mass? Why there are no massless charged particles? what prohibits it? Is there any theory that prohibits it Or still to find one? How charge of a particle is calculated?
  44. S

    Motion of Charged Particles in Electric Fields

    Multiple Point Charges Alright so the question is: A charge of 1.2x10^-3C is fixed at each corner of a rectangle that is 30cm wide and 40cm long. What is the magnitude and direction of the electric force on each charge? What is the electric field and the electric potential at the centre? I...
  45. S

    Work required to assemble charged particles

    Homework Statement How much work is required to assemble eight identical charged particles, each of magnitude q, at the corners of a cube of side s? Homework Equations W=deltaU delta U = kQq/r The Attempt at a Solution I've come up with those equations, and was trying to plug...
  46. F

    Calculating Charged Particles Transferred -15nC to -10nC

    Homework Statement A plastic rod that has been charged to -15.0 nC touches a metal sphere. Afterward, the rod's charge is -10nC. Part C - How many charged particles were transferred? Homework Equations Don't know any e=1.6 * 10^-19 The Attempt at a Solution This chapter...
  47. S

    What is the vector force exerted by Particle B on Particle A?

    Homework Statement -A charged particle A exerts a force of 2.62 micro coulombs to the right on charged particle B when the particles are 13.7 mm apart. Particle B moves straight away from A to make the distance between them 17.7 mm. What vector force does it then exert on A? Homework...
  48. N

    How to focus a beam of charged particles?

    I was discovering a way to focus a number of charged particles which has been accelerated by Van de Graff generator into a beam.I do tried to find ideas in uniform magnetic field,but it seems I can only focus the particles onto a point rather than a beam.So here I was asking whether there had...
  49. S

    Why Do Accelerated Charged Particles Radiate?

    why accelerated charged particles radiate? i appreciate if you help.
  50. C

    Electrostatic force of four charged particles

    [SOLVED] electrostatic force Homework Statement The figure shows an arrangement of four charged particles, with angle θ = 33.0 ˚ and distance d = 3.00 cm. Particle 2 has charge q2 = 8.00 × 10-19 C; particles 3 and 4 have charges q3 = q4 = -1.60 × 10-19 C. What is the distance D between the...
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