Thebrain 9 local server8/22/2023 Power lines produce magnetic fields continuously because current is always flowing through them. Magnetic fields are measured in microteslas (μT, or millionths of a tesla).Įlectric fields are produced whether or not a device is turned on, whereas magnetic fields are produced only when current is flowing, which usually requires a device to be turned on. ![]() The strength of a magnetic field decreases rapidly with increasing distance from its source. Electric fields are measured in volts per meter (V/m).Ī magnetic field results from the flow of current through wires or electrical devices and increases in strength as the current increases. ![]() As the voltage increases, the electric field increases in strength. ![]() Electric and magnetic fields are invisible areas of energy (also called radiation) that are produced by electricity, which is the movement of electrons, or current, through a wire.Īn electric field is produced by voltage, which is the pressure used to push the electrons through the wire, much like water being pushed through a pipe.
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