enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Static electricity - Wikipedia

    en.wikipedia.org/wiki/Static_electricity

    The phenomenon of static electricity requires a separation of positive and negative charges. When two materials are in contact, electrons may move from one material to the other, which leaves an excess of positive charge on one material, and an equal negative charge on the other. When the materials are separated they retain this charge imbalance.

  3. Electric charge - Wikipedia

    en.wikipedia.org/wiki/Electric_charge

    Electric charge is a conserved property: the net charge of an isolated system, the quantity of positive charge minus the amount of negative charge, cannot change. Electric charge is carried by subatomic particles. In ordinary matter, negative charge is carried by electrons, and positive charge is carried by the protons in the nuclei of atoms ...

  4. Electrostatics - Wikipedia

    en.wikipedia.org/wiki/Electrostatics

    The electrostatic field (lines with arrows) of a nearby positive charge (+) causes the mobile charges in conductive objects to separate due to electrostatic induction. Negative charges (blue) are attracted and move to the surface of the object facing the external charge. Positive charges (red) are repelled and move to the surface facing away ...

  5. Electricity - Wikipedia

    en.wikipedia.org/wiki/Electricity

    The presence of either a positive or negative electric charge produces an electric field. The motion of electric charges is an electric current and produces a magnetic field. In most applications, Coulomb's law determines the force acting on an electric charge.

  6. Electric field - Wikipedia

    en.wikipedia.org/wiki/Electric_field

    Illustration of the electric field surrounding a positive (red) and a negative (blue) charge. Electrostatic fields are electric fields that do not change with time. Such fields are present when systems of charged matter are stationary, or when electric currents are unchanging. In that case, Coulomb's law fully describes the field. [17]

  7. Electrostatic induction - Wikipedia

    en.wikipedia.org/wiki/Electrostatic_induction

    The electrostatic field (lines with arrows) of a nearby positive charge (+) causes the mobile charges in metal objects to separate. Negative charges (blue) are attracted and move to the surface of the object facing the external charge. Positive charges (red) are repelled and move to the surface facing away. These induced surface charges create ...

  8. Triboelectric effect - Wikipedia

    en.wikipedia.org/wiki/Triboelectric_effect

    In all materials there is a positive electrostatic potential from the positive atomic nuclei, partially balanced by a negative electrostatic potential of what can be described as a sea of electrons. [36] The average potential is positive, what is called the mean inner potential (MIP). Different materials have different MIPs, depending upon the ...

  9. Coulomb's law - Wikipedia

    en.wikipedia.org/wiki/Coulomb's_law

    If both charges have the same sign (like charges) then the product is positive and the direction of the force on is given by ^; the charges repel each other. If the charges have opposite signs then the product q 1 q 2 {\displaystyle q_{1}q_{2}} is negative and the direction of the force on q 1 {\displaystyle q_{1}} is − r ^ 12 {\textstyle ...