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

    Charged Particles Moving in Magnetic Field

    The picture tube in a television uses magnetic deflection coils rather than electric deflection plates. Suppose an electron beam is accelerated through a 50.0 kV potential difference and then through a region of uniform magnetic field 1.00 cm wide. The screen is located 10.0 cm from the center...
  2. P

    Charged Particles in Magnetic Fields

    1. An ionized deuteron (a particle with a + e charge) passes through a velocity selector whose perpendicular magnetic and electric fields have magnitudes of 40 mT and 8.0 kV/m, respectively. Find the speed of the ion 2. When a charge particle moves in a velocity selector, both electric...
  3. M

    Two charged particles fired at each other.

    [SOLVED] Two charged particles fired at each other. Homework Statement A proton and an alpha particle (q = +2.00e, m = 4.00u ) are fired directly toward each other from far away, each with an initial speed of 0.172c. What is their distance of closest approach, as measured between their...
  4. R

    Why the charged particles flow perpendicular to the magnetic field?

    Why the charged particles flow perpendicular to the magnetic field?? It might seems like a electrical physics problem.. I need to understand why the charged particles flow perpendicular to the magnetic field.. Any idea??
  5. U

    Coulomb's Law and charged particles

    1. Homework Statement Hi, I would appreciate it if someone could help me with this question, I am a n00b here Please and thank you Okay here's the question. The particles have charges Q1 = -Q2 = 100nC and Q3 = -Q4 =200nC and distance a = 5.0cm. What are the x and y components of the...
  6. B

    Forces between 3 charged particles

    Homework Statement What is the force F_vec on the 1 nC charge? Give answer as magnitude in Newtons. Homework Equations F = K qq/r^2 K = 1/4(pi)epsilon_knot; = 8991804694 N m^2/C The Attempt at a Solution A. Convert it all. cm to m. nC to C. B. Vectors for Forces. The two...
  7. C

    Angle Between Charged Particles in Equilibrium

    Homework Statement Four charged particles are hung from the same position. At equilibrium, what will the angle between any two consecutive particles be (wrt common position)? The Attempt at a Solution I don't really get the question. Am I supposed to consider gravity as well? Can the...
  8. S

    Motion of Charged Particles in Electric Fields

    Homework Statement 3. Two electrons are fired at 3.5 x 10^6 m/s directly at each other. a)Calculate the smallest possible between the two electrons. Homework Equations Ek= 1/2mv^2 Ee= kq1q2/r The Attempt at a Solution I made the Ek and the Ee equal, but i keep on getting the...
  9. G

    Motion of charged particles in E and B fields

    Homework Statement Photoelectrons are emitted with negligible initial velocity from one plate of a parallel-plate capacitor which is at zero potential. The other plate is held at a potential +V and the capacitor is in a uniform magnetic field of flux density B parallel to the plane of the...
  10. V

    Charged particles from our Sun travelling too fast?

    I read somewhere (Wikipedia I think) that charges particles are leaving our Sun and heading for Earth faster than can be explained by current solar models.Is it possible that there is some Hawking radiation inside the Sun imparting extra energy to these particles? Or does Hawking radiation only...
  11. S

    How Neutrons Decay to Charged Particles

    I was just reading this.. Free Neutron decays into proton, electron and neutrino. neutron --> proton + electron + v (neutrino) ---- My Question: Neutron is chargeless. How can it give proton and neutron which are charged ? (If the question is simple i am sorry, I am new to nuclear physics)
  12. D

    A gun that fired charged particles

    Homework Statement A gun that fires charged particles accelerates a 5-μC charge from rest through a potential difference of 50,000 V. The particle has a mass of 0.025 kg. With what speed does it leave the gun? Homework Equations EPE = KE (1/2)qV = (1/2)mv^2 , solve for v^2...
  13. K

    Movement of Charged Particles in a field

    Homework Statement Two electrons are 10-9m Apart when they are released.What is their speed when they are 10-8m apart? Homework Equations Ek=-EE EE=Kq1q2 ------- r The Attempt at a Solution Ive tried 1/2mv^=-(Ke(squared) - Ke(squared)...
  14. F

    Solving Charged Particles: Mass & Charge

    Two equally charged particles are held 3.8 10-3 m apart and then released from rest. The initial acceleration of the first particle is observed to be 5.0 m/s2 and that of the second to be 9.0 m/s2. The mass of the first particle is 6.3 10-7 kg. (a) What is the mass of the second particle...
  15. E

    Three Charged Particles in an xy-plane

    Question: A particle of charge 4.96 nC is placed at the origin of an xy-coordinate system, and a second particle of charge -1.95 nC is placed on the positive x-axis at x = 3.99 cm. A third particle, of charge 6.04 nC is now placed at the point x = 3.99 cm, y = 3.05 cm. Part A Find the...
  16. S

    What is the Origin of Charge in Subatomic Particles?

    I was wondering what causes the charge in the subatomic particles.
  17. Amith2006

    Trajectory of charged particles in a uniform magnetic field

    1) An electron and a proton are injected into a uniform magnetic field at right angles to the direction of the field with the same Kinetic Energy. Then: a)the electron trajectory will be less curved than the proton trajectory b)the proton trajectory will be less curved than the electron...
  18. 9

    Magnetic Forces on charged particles

    If a magnetic force does no work on a charged particle, how can it have any effect on the particle's motion? Are there other examples of forces that do no work but have significant effect on a particle's motion?
  19. H

    Why Did I Misinterpret the Direction of E in Charged Particles?

    http://img147.imageshack.us/img147/264/chargedparticlesii6fe.png In the above question I thought the direction of E would be to the right. Apparently that's wrong... why?
  20. H

    Charged particles - magnitude of force

    http://img77.imageshack.us/img77/5310/chargedparticles7of.png What is the magnitude of the force on a -1.2 muC charge placed at a point 1.6 cm to the left of the middle charge?? Answer in units of N. This is what I did: I used Fx = k*|Q|*(qx/r^2) Q= 1.2*E-6 I plugged in...
  21. A

    Motion of 2 charged particles in a constant electric field

    Two large parallel copper plates are 5.0cm apart and have a uniform eletric field between them as shown below. An electron is released from the negative plate at the same time that a proton is released from the positive plate. Neglect th force of the particles on each other and find their...
  22. C

    What Happens to the Force on Charged Particles When They Move Apart?

    When a positive and negative charge are held close to each other and then released, does the force on each particle increase, decrease, or stay the same?
  23. samalkhaiat

    Explaining E/M Ratios of Charged Particles without Math

    According to GR as well as Maxwell's theory, when charged particles are accelerated they radiate energy by electromagnetic and gravitational radiation. This energy, according to special relativity, is equivalent to mass. I wonder, how can elementary particles preserve their fixed e/m ratios...
  24. P

    Old Book Review - Classical Charged Particles

    Old Book Review - "Classical Charged Particles" Hi folks I've picked up a rather old book. It was written back in 1965 by Fritz Rohrlich and is called "Classical Charged Particles". I found this book by a reference in Jackson's EM text. I have to say that this is a superb book! I don't think...
  25. J

    A small question, do all + charged particles have the same spin direction?

    A small question, do all +charged particles have the same spin direction, and if they do, does their speed relate to their degree of charge? This might sound stupid, but its for a theory I have. Thanks in advance.
  26. ranger

    Calculating Resultant Force Vectors in a 2D System

    Lets say that we have a four positive and equally charged particles. They are located on the corners of a square. Can someone show (by diagram) how the other three particles would affect anyone particle. Please show how you reslove the vectors into its componets and how you get the resultant...
  27. J

    Calculating Electric Field Between Charged Particles

    Hi, My Question: What are the magnitude and direction of the electric field at a midway between a -8.0 microcolumb and a 7.0 microcolumb charge 8.0 cm apart? Assume no other charges are nearby. Work E=F/q F=(kQ1Q2)/r^2 F=((9.0 X 10^9 N m^2/C)(-8.0 X10^-16 C)(7.0...
  28. C

    Charged Particles: Electric & Magnetic Fields in 3D Space

    Every charged particle has an electric and magnetic field yea? Both the fields are in spherical 3D Space yea, where the strength of the fields fall off as 1/r^2? So in some diagrams found on the net why are the electric and magnetic fields perpendicular to each other and in an oscillating form?
  29. S

    Trouble Finding Charge Ratio for 3 Charged Particles in Line

    I'm stuck on what I think should be a fairly easy question. The question is that there are three charged particles in a line, equidistant (distance L) from each other. From left to right, we'll call them 1, 2, and 3. 1 and 2 are fixed in place, but 3 is free to move. However, the net charge...
  30. N

    Charged particles moving through electric fields

    I'm having some trouble trying to derive an equation for the movement of a positive ion through a quadropole. The problem is that my primary source in this is "Physics for Scientists and Engineers with Modern Physics" by Raymond A. Serway and John W. Jewett, Jr. which has an excellent part on...
  31. P

    Does the equivalence principle hold for charged particles?

    I'm new here so this may be an old question. The equivalence principle states (roughly) that one can't distinguish between an accelerating frame and a uniform gravitational field. But an accelerated charged particle radiates. Thus the EP seems to imply that a stationary charged particle in a...
  32. N

    Calculating Initial Separation of Charged Particles Using Conservation Laws

    Ok here's the question: One particle has a mas of 3.00 x10^-3 kg and a charge of +8.00uC. A second particle has a mass of 6.00x10^-3 kg and the same charge. The two particles are initally held in place and then released. The particles fly apart, and when the separation between them is 0.100m...
  33. B

    Coulomb's Law Problem and charged particles

    I cannot figure out this problem. I mean, I can't really even figure out what it is asking. I am not expecting anyone to solve it for me or anything. I just need some help as to how to get started. Particles A and B Figure 22-25a shows charged particles A and B that are fixed in place on...
  34. R

    Accelerating charged particles and FOR

    if, say, an electron is stationary on Earth (ignore the probability or possibility of this for now). it, of course, is not emitting any EM radiation. However, an observer in space (stationary with reference to the sun) is looking at the electron. relative to them, the electron is accelerating...
  35. A

    Charged particles in magnetic field

    I've been trying to work this, but the way I'm substituting, I get no variables left...:-\ It's...freaky lol. The question is Suppose a new particle is discovered, and it is found that a beam of these particles passes undeflected through "crossed" electric and magnetic fields, where E=316 V/m...
  36. M

    Four charged particles at the corners of a square

    problem 12. Four charged particles are placed so that each particle is at the corner of a square. The sides of the square are 13 cm. The charge at the upper left corner 3.6 uC, the charge at upper right corner -6.5 uC, the charge at lower left corner, and the charge at the lower right corner is...
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