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  2. Skin effect - Wikipedia

    en.wikipedia.org/wiki/Skin_effect

    Cause of skin effect. A main current I flowing through a conductor induces a magnetic field H.If the current increases, as in this figure, the resulting increase in H induces separate, circulating eddy currents I W which partially cancel the current flow in the center and reinforce it near the skin.

  3. Faraday's law of induction - Wikipedia

    en.wikipedia.org/wiki/Faraday's_law_of_induction

    This field causes, by electromagnetic induction, an electric current to flow in the wire loop on the right. The most widespread version of Faraday's law states: The electromotive force around a closed path is equal to the negative of the time rate of change of the magnetic flux enclosed by the path.

  4. Electromagnetic induction - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_induction

    On the far side of the figure, the return current flows from the rotating arm through the far side of the rim to the bottom brush. The B-field induced by this return current opposes the applied B-field, tending to decrease the flux through that side of the circuit, opposing the increase in flux due to rotation. On the near side of the figure ...

  5. Faraday paradox - Wikipedia

    en.wikipedia.org/wiki/Faraday_paradox

    In step 1, the paradox can be readily solved: the circuit does not constitute a simple loop of wire, as postulated by Faraday's law of induction; it is rather the union of two loops, because the current can flow through the two halves of the rim (see figure 2). If, on the other hand, one keep only one part of the rim from the radius junction to ...

  6. Inductance - Wikipedia

    en.wikipedia.org/wiki/Inductance

    He expected that, when current started to flow in one wire, a sort of wave would travel through the ring and cause some electrical effect on the opposite side. Using a galvanometer , he observed a transient current flow in the second coil of wire each time that a battery was connected or disconnected from the first coil. [ 10 ]

  7. Electric current - Wikipedia

    en.wikipedia.org/wiki/Electric_current

    A flow of positive charges gives the same electric current, and has the same effect in a circuit, as an equal flow of negative charges in the opposite direction. Since current can be the flow of either positive or negative charges, or both, a convention is needed for the direction of current that is independent of the type of charge carriers ...

  8. Geomagnetically induced current - Wikipedia

    en.wikipedia.org/.../Geomagnetically_induced_current

    This is partly due to the increase in the interconnectedness at higher voltages, connections in terms of power transmission to grids in the auroral zone, and grids operating closer to capacity than in the past. To understand the flow of GIC in power grids and to advise on GIC risk, analysis of the quasi-DC properties of the grid is necessary. [6]

  9. Lenz's law - Wikipedia

    en.wikipedia.org/wiki/Lenz's_law

    The current induced in a circuit due to a change in a magnetic field is directed to oppose the change in flux and to exert a mechanical force which opposes the motion. Lenz's law is contained in the rigorous treatment of Faraday's law of induction (the magnitude of EMF induced in a coil is proportional to the rate of change of the magnetic flux ...