Identify the two main relationships of electromagnetism. Electric currents produce magnetic fields around themMagnetic field lines show how electric currents flow around a magnetAll magnets have electric currents flowing through themMagnetic fields can produce electric currents when they move or change
Question
Identify the two main relationships of electromagnetism. Electric currents produce magnetic fields around themMagnetic field lines show how electric currents flow around a magnetAll magnets have electric currents flowing through themMagnetic fields can produce electric currents when they move or change
Solution
The two main relationships of electromagnetism are:
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Electric currents produce magnetic fields: This is known as Ampere's Law. When an electric current flows through a wire, it generates a magnetic field around the wire. The direction of this magnetic field can be determined using the right-hand rule.
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Magnetic fields can produce electric currents: This is known as Faraday's Law of Electromagnetic Induction. When a magnetic field changes within a loop of wire, an electromotive force (EMF) is induced, which can cause an electric current to flow in the wire. The direction of the induced current can be determined using Lenz's Law, which states that the induced current will always work to oppose the change in the magnetic field that produced it.
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