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It goes from a cool current to a warm current as it gets closer to the equator.
When an electrical current runs through a conductor, electrons flow in the direction of the current. This flow of electrons creates a magnetic field around the conductor. The amount of current flowing through the conductor is directly proportional to the strength of the magnetic field produced.
The free electrons in a conductor will, when a difference of potential (voltage) is applied at its ends, participate in electron current flow (or just current, if you prefer). The voltage applied to the conductor will drive current through the conductor, and the free electrons will support current flow. These electrons will actually move through the conductor. As electrons are driven into one end of the conductor, the free electrons "shift over" and electrons stream out the other end of the conductor. This is the essence of current flow in conductors.
When the current through the conductor is reversed, the magnetic field around the conductor will also reverse. As a result, the compass needle in Figure 7-11 will deflect in the opposite direction compared to when the current was flowing in the original direction.
When current reaches an insulator, the electrons cannot flow through the material because insulators have high resistance to the flow of electricity. This can lead to a buildup of charge on the surface of the insulator.
The current in a conductor can be increased by either increasing the voltage applied across the conductor or decreasing the resistance of the conductor.
When a conductor is passed through a magnetic field, an electric current is induced in the conductor. This is known as electromagnetic induction, a phenomenon discovered by Michael Faraday in the 19th century.
When current reaches saturation in a device like a transistor, it means the device can no longer increase the output current even if the input continues to increase. This generally indicates that the device has reached its maximum current-carrying capacity and can lead to distortion in the output signal.
A very heavy current flows in the conductor until sufficient charge has been neutralised to stop the breakdown of the air between the cloud and the ground.
Super conductor will have zero resistance or zero resistivity. This happens when the temperature of the conductor reaches a very low temperature known as critical super conducting transition temperature. In case of mercury it will be 4.2K.
how we decide current throuh conductor