What is Charged particle: Definition and 271 Discussions

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. M

    How charged particle got to do with magnetism

    hello, I am not too sure of how charged particle got to do with magnetism. "Magnetism is a force of attraction or replusion that acts at a distance. It is due to a magnetic field, which is caused by moving electrically charged particles or is inherent in magnetic objects such as a magnet."...
  2. S

    How Strong is the Force Between a Uranium Nucleus and an Electron at 0.1 nm?

    Homework Statement What is the force of attraction between a uranium nucleus(atomic number 92) and an electron at a distance of 0.1 nm? Homework Equations F = kQ1Q2/r2 The Attempt at a Solution F= 8.99*109*92*1.6*10-19*(-1.6*10-19)/0.1*10-9 Please let me know the attempt at a...
  3. Q

    Charged Particle Motion in a Magnetic Field

    Homework Statement A proton is moving through a vertical magnetic field. The (instantaneous) velocity of the proton is 8.5x105m/s horizontally in the north direction. The (instantaneous) acceleration produced by the magnetic force is 2.90x105m/s2 in the west direction. What is the magnitude...
  4. B

    Trajectory of charged particle moving in a magnetic field

    In this video here are those pink green the magnetic field lines? If so where does the proton come from? If I'm not mistaken a charged particle in motion will only be influenced by the magnetic field if its not moving parallel to the magnetic field lines but in this video the proton appears to...
  5. L

    Electrostatics - finding magnitude of a third charged particle

    1. Two point charges q and 4q are at x=0 and x=L, respectively, and free to move. A third charge is placed so that the entire three-charge system is in static equilibrium. Two point charges q and 4q are at x=0 and x=L, respectively, and free to move. A third charge is placed so that the entire...
  6. E

    Finding Motion of Charged Particle in Changing Magnetic Field (numerically)

    I want to find the motion of an electron in a spatially varying magnetic field using finite element analysis, and have some way of estimating the error (especially in the path length). I imagine somewhere someone has written up an algorithim that does this, but I haven't had much luck googling...
  7. P

    Charged particle movement close to single charged plate

    Hi everybody. I am a mechanical engineer trying to do an electrical experiment. I wonder if anybody can help me with an advice. Here is my experiment. I have a single rectangular metal plate to which I apply a known high negative voltage DC. Not sure yet what that voltage is going to be...
  8. A

    Change in electric field of charged particle

    It is known that the motion of a charged particle creats a magnetic field and also at speeds approaching c there will be an increase in its relativistic mass, but what effect does motion of a charged particle have on the magnitude of its electric field (Couloumb force). From what I know at...
  9. pellman

    Does a charged particle in free fall radiate?

    "Accelerated charges radiate." That much-repeated phrase is the extent of my familiarity with radiating charges, though I am trying to bring myself up to speed on the Abraham-Lorentz-Dirac force. Well, in relativity theory gravity is locally equivalent to an accelerating frame. so if we...
  10. A

    Behaviour of charged particle.

    A charged particle moving through a uniform magnetic field experiences a force perpendicular to the direction of motion due to the magnetic field created around the charged particle. I would like to know if the particle were stationary and a uniform magnetic field moved past it would the nature...
  11. Q

    Calculating the Forces on a Charged Particle in an Electric and Magnetic Field

    Homework Statement A magnet produces a 0.40 T field between its poles, directed horizontally to the east. A dust particle with charge q = -8.0×10^-18 C is moving vertically downwards with a speed of 0.30 cm/s in this field. Whilst it is in the magnetic field, the dust particle is also in an...
  12. H

    Do Charged Particles Radiate in Different Frames of Reference?

    I would appreciate any insight into these questions; I have had a little EM but no general relativity. Maybe general relativity is not involved at all - just EM with an observer in an accelerated frame. 1. Suppose we have two charged particles Q1 and Q2. Q1 is sitting on our lab table. Q2...
  13. K

    Motion of a charged particle in a magnetic field

    Homework Statement Two identical charged particles moving with the same speed enter a region of uniform magnetic field. If one of these enters normal to the field direction, and the other enters at an angle of 30 degrees with the field, what would be the ratio of their angular frequencies...
  14. E

    How Do You Calculate an Electron's Motion in a Magnetic Field?

    Homework Statement An electron of kinetic energy 1.20keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 25.0cm. Find a.) The electron's speed. b.) the magnetic field magnitude c.)the circling frequency, and d) the period of the motion. Homework Equations...
  15. R

    Calculation of wavelength of EMW produced due to an accelerated charged particle

    if an electron is accelerated by 2eV energy. then what will be the wavelength of emw produced? can we use E=hc/wavelength here? should we use always de broglie hypothesis for this? what will be the difference between wavelength of electron and wavelength of emw? are they same or not?
  16. J

    Forces on a Positively Charged Particle in an Electric & Magnetic Field

    Homework Statement Assuming the particle in Figure P24.62 is positively charged, what are the directions of the forces due to the electric field and to the magnetic field? a. The force due to the electric field is directed up (toward the top of the page); the force due to the magnetic field...
  17. G

    Magnetic field of moving charged particle

    What is the appropriate way to model the magnetic field of a moving charged point particle? I don't believe you can use Biot-Savart because it is not a steady current. I am trying to figure out what EMF (current) would be induced in a square or round conducting loop when a charged point...
  18. A

    How Is the Mass of a Charged Particle Determined in an Electric Field?

    Homework Statement A positively charged particle (9.35pC) is suspended in equilibrium in an electric field between two horizontal parallel plates with opposite charges. Each one of the square plates has a charge of 5.5x10^-5C; and are separated by 6.25mm and their sides are 11cm long what is...
  19. R

    Determining the Magnetic Force on a Moving Charged Particle

    Homework Statement If the magnetic field of the wire is 2.5×10^−4 and the electron moves at 1.0×10^7 , what is the magnitude of the force exerted on the electron? Homework Equations F=qvBsin(theta) The Attempt at a Solution Sin(theta) = sin90 = 1 q = -1 v = 1e7 B = 2.5e-4 So...
  20. R

    Mass of charged particle in magnetic field

    [b]1. A 1.56024 μC charged particle with a kinetic energy of 0.115905 J is placed in a uniform magnetic field of magnitude 0.150267 T. If the particle moves in a circular path of radius 3.13685 m, find its mass. Answer in units of kg. Homework Equations Fe= Fm Fe= qE KE=mv^2/2 Fm=...
  21. R

    Mass of charged particle in magnetic field

    [b]1. A 1.56024 μC charged particle with a kinetic energy of 0.115905 J is placed in a uniform magnetic field of magnitude 0.150267 T. If the particle moves in a circular path of radius 3.13685 m, find its mass. Answer in units of kg. Homework Equations Fe= Fm Fe= qE KE=mv^2/2 Fm=...
  22. Z

    Motion of a Charged Particle in an Electric Field

    Homework Statement A proton moves at 4.50 x 108 m/s in the horizontal direction. It enters a uniform vertical electric field with a magnitude of 9.60 x 103 N/C. Ignoring any gravitational effects, find (a) the time interval required for the proton to move 5.00 cm horizontally, (b) its vertical...
  23. G

    Torque on a charged particle moving in a circle in a uniform B field

    Homework Statement A particle of charge q = e moves in a circle of radius = 0.44 m with speed v = 2.350×107 m/s. Treating the circular path as a current loop with constant current equal to its average current, find the maximum torque exerted on the loop by a uniform magnetic field of magnitude...
  24. N

    Charged particle in a magnetic field

    Homework Statement A charged particle with a charge-to-mass ratio of 5.7 x 10^8 C/kg travels on a circular path that is perpendicular to a magnetic field whose strength is .72 T. How much time does it take for the particle to make one revolution? Homework Equations (Magnetic)F = qvB...
  25. B

    Charged particle and Earth's magnetic field at equator question

    Homework Statement Stumped on this one. A charged particle hurles through space creatings its own magnetic field, if it strikes the Earth's equator, the 2 magnetic fields interact and... a) do not affect the particles direction b) change the particles speed but not direction c)...
  26. D

    Work on a charged particle due to Ring

    Homework Statement A ring of diameter 7.90 cm is fixed in place and carries a charge of 5.90 \muC uniformly spread over its circumference. How much work does it take to move a tiny 3.80 \muC charged ball of mass 1.90 g from very far away to the center of the ring? Also, What is the...
  27. H

    Forces from a cherged ring onb a charged particle

    Homework Statement A charge, Q, is equally distributed in a small wireformed as a circle with radius R. Another charge, q, is placed at a distance R above the midpoint of the circle. What force affects the charge q? Homework Equations F = \frac{Qq}{4 \pi \varepsilon_0 r^2} The...
  28. F

    Changing kinetic E of charged particle in magnetic field - Halbach array

    changing kinetic E of charged particle in magnetic field -- Halbach array hi, I read somewhere that you can't change a charged particle's (we'll say electron) kinetic energy with a strong magnetic field, that you only change the electron's direction. I'm assuming a frictionless environment...
  29. P

    Charged particle at relativistic velocity

    Imagine a charged particle moving in vacuum with relativistic velocity. It emits electromagnetic wave with some known energy. This energy can be detected and used somewhere else. I guess this energy should come from particle’s kinetic energy, thus particle should slowly decelerate over time...
  30. V

    Force on charged particle to enter electric field perpendicularly

    how much force, if at all. is required to make a particle enter an electric field perpendicularly... eg, to let a charged particle enter a charged capacitor perpendicularly, is external force required??
  31. S

    Finding mass of charged particle - magnetic field

    Homework Statement an isotope separator is used to separate charged particles having different masses. assume that two types of particles enter a region of constant magnetic field with the same kinetic energy, and assume that all particles have the same charge. the radius of the circular...
  32. N

    Magnetic Force on Charged Particle: True or False?

    Homework Statement A charged particle is moving in a uniform magnetic field. Which of the following statements concerning the magnetic force exerted on the particle is false? A) It increases the speed of the particle. B) It does no work on the particle. C) It changes the velocity of...
  33. A

    Why magnetic field deflects a charged particle.?

    Hello. Sir My question is that:Why magnetic field deflects a charge particle or a charged particle experiences a force in a magnetic field?Ok In electric field between two parallel plates a +ve charge particle deflects towards -ve plate when it is thrown perpandicularly. But in magnetic...
  34. C

    Electric field affecting a charged particle question

    At the moment I'm trying to figure out charged particle in electric field behavior and there's a type of question that seems to be confusing me lots. Ok, here's such a question that I'm not sure about: A virus rests on the bottom plate of oppositely charged parallel plates in the vacuum...
  35. S

    Kinetic Energy of Charged Particle

    [SOLVED] Kinetic Energy of Charged Particle Homework Statement Particles A (of mass m and charge Q) and B (of m and charge 5Q) are released from rest with the distance between them equal to 0.9976 m. If Q=33e-6 C, what is the kinetic energy of particle B at the instant when the particles are...
  36. A

    Magnetic Force on a Charged Particle in Constant Magnetic Field

    Homework Statement A charged particle is moving in a uniform, constant magnetic field. Which one of the following statements concerning the magnetic force exerted on the particle is false? It changes the velocity of the particle. It increases the speed of the particle. It does not...
  37. C

    Acceleration of a charged particle

    Homework Statement What is the acceleration of a charged particle in a uniform electric field? Assume the particle moves along a straight line parallel to the electric field. Show that a particle starting from rest at x=0 and t=0 the speed and position are given by the following formulas...
  38. Saladsamurai

    Net Force of a charged particle (Coulomb's Law)

    Homework Statement I really can't see where I am going wrong here. I would latex out my work, but it would take way too long, so I have scanned it in. It should be easy enough to read though. Its NUMBER 7, fig 21-22 Also the blurr says '100 nC' The Attempt at a Solution
  39. S

    How can a magnetic field move a charged particle?

    Hi, So in order to earn a few crucial points back from my teacher I need to prove that a magnetic field can increase the speed of a charged particle. I've made a list of a couple methods so far (see examples below) but am hoping that you all could help me think of a few more. Now I know...
  40. L

    Determine the force in z-direction on the gyrocenter of a charged particle

    Homework Statement Determine the force in z-direction on the gyrocenter of a charged particle in a diverging magnetic field. \frac{\partial B}{\partial z} < 0 Homework Equations The Attempt at a Solution Please give me a starter. Could I use the Lorentz force in this case?
  41. M

    Lagrangian for a charged particle in a magnetic field

    Hey I have a question that was almost completely answered in this thread: https://www.physicsforums.com/showthread.php?t=116098 Specifically someone interpreted his question to be how exactly do you get that the term in the Lagrangian corresponding to the magnetic potential is...
  42. R

    Acceleration of a Charged Particle

    Homework Statement A positively charged particle of mass 3.0 X 10 ^-12 kg and charge +6.4 X 10^-5 C is perpendicular to a 1.5 T magnetic field. If the particle has a speed of 4.8 X 10^3 m/s, the acceleration of the particle...? Homework Equations e = kg / r^2 qB = mv / r The...
  43. N

    How Does Zero Total Energy Affect the Motion of a Charged Particle?

    In one dimension, the motion of a charged particle (q1) will be [assume q2 is stationary] \frac{d^2 x}{d t^2} =\frac{Kq_1q_2}{m x^2} Is there a solution to this differential equation?
  44. N

    Charged particle optics papers

    Can anyone refer me to some webpages where elementary matrix treatment to charged beam kinematics and optics can be found?I am working on this myself and need to refer to some papers. the problem is that I cannot access this from my home.Please help...
  45. M

    Hamiltonian of charged particle

    A charged particle of mass m is attracted by a central force with magnitude F = \frac{k}{r^2} . Find the Hamiltonian of the particle. I'm just wondering if I did this correctly because it seemed too easy. First I used the fact that -dU/dr = F = k/r^2, so the potential (with infinite...
  46. B

    Radius of the path of a charged particle in a mass spectrometer

    Homework Statement Consider the mass spectrometer shown schematically in Figure P19.30. The electric field between the plates of the velocity selector is 850 V/m, and the magnetic fields in both the velocity selector and the deflection chamber have magnitudes of 0.910 T. Calculate the radius...
  47. M

    If a charged particle is free falling in the gravitational field-

    If a "charged particle" is free falling in the gravitational field---------- If a "charged particle" is free falling in the earth`s gravitational field, it will emit electromagnetic waves? (1)If a person stands on the ground, he will say:Yes ! because,the charged particle is accelerated by...
  48. K

    Applying Newton's 2nd law to single charged particle

    How much are we justified in applying Newton's 2nd law in predicting trajectories of a single charged particle?What will be the answer for a number of charges?Of course, we have cyclotron motion at hand, but still...as we know, sub atomic level physics needs quantum mechanical consideration and...
  49. M

    Magnetic field and charged particle help

    When a charged particle moves at an angle of 13° with respect to a magnetic field, it experiences a magnetic force of magnitude F. At what angle (less than 90°) with respect to this field will this particle, moving at the same speed, experience a magnetic force of magnitude 2.4F?
  50. E

    Charged particle in a magnetic field

    When two current carrying wires are place beside each other they are are either attracted or repelled by the magnetic fileds generated and these fields are just electrostatic forces caused by the relativistic effect. Why does a stationary charged particle not feel this force from a single...
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