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Related Concept Videos

Motion Of A Charged Particle In A Magnetic Field01:22

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A charged particle experiences a force when moving through a magnetic field. Consider the field to be uniform and the charged particle to move perpendicular to it. If the field is in a vacuum, the magnetic field is the dominant factor determining the motion. Since the magnetic force is perpendicular to the direction of motion, a charged particle follows a curved path. The particle continues to follow this curved path until it forms a complete circle. Another way to look at this is that the...
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Magnetic Field due to Moving Charges01:23

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
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Electric Field of Two Equal and Opposite Charges01:30

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Atoms generally contain the same number of positively and negatively charged particles, protons, and electrons. Hence, they are electrically neutral. However, the centers of the positive and negative charges do not always coincide. In such a scenario, the electric field of an atom may not be zero.
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Electric Field at the Surface of a Conductor01:26

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Consider a conductor in electrostatic equilibrium. The net electric field inside a conductor vanishes, and extra charges on the conductor reside on its outer surface, regardless of where they originate.
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Electric Field01:16

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Consider two point charges, each exerting Coulomb force on the other. It is possible to describe the Coulomb interaction via an intermediate step by defining a new physical quantity called the electric field.
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In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
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Related Experiment Video

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Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
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Behavior of Ultra Fine Particles in Electric Field.

J Shibata, N Murayama

    Journal of Nanoscience and Nanotechnology
    |September 29, 2015
    PubMed
    Summary

    The study measured ultra fine particle behavior in an electric field, finding particle velocity changes with size. This behavior can be used for classifying fine particles based on their electric field response.

    Area of Science:

    • Physics
    • Materials Science
    • Nanotechnology

    Background:

    • Understanding particle behavior in electric fields is crucial for applications like particle classification.
    • Ultra fine particles exhibit complex interactions with electric fields due to various forces.

    Purpose of the Study:

    • To investigate the behavior of ultra fine particles in an electric field.
    • To determine the relationship between particle size and velocity in an electric field.
    • To explore the potential application of this behavior in fine particle classification.

    Main Methods:

    • Spherical polystyrene particles of varying sizes (0.03 to 9.6 µm) were used.
    • Particle movement velocity in an electric field was measured.
    • Forces acting on particles, including electrical and friction forces, were considered.

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    Main Results:

    • Particle velocity in an electric field is dependent on particle size.
    • For particles smaller than 1 µm, velocity increases with size.
    • For particles larger than 1 µm, velocity decreases with size.

    Conclusions:

    • The observed particle velocity-size relationship in electric fields can be utilized for fine particle classification.
    • The phenomena are explained by the interplay of electrical, friction, and ionic forces.