What happens to a copper wire when is moved across a magnetic field?
When a copper wire is moved across a magnetic field, a phenomenon called electromagnetic induction occurs. The magnetic field induces a current to flow in the wire, leading to the production of an electric current. This is known as Faraday's Law of Electromagnetic Induction.
The amount of current induced depends on various factors, including the strength of the magnetic field, the velocity of the wire, and the angle between the wire and the magnetic field. Additionally, the length and resistance of the wire also affect the induced current.
This phenomenon forms the basis of electrical generators. In such generators, a rotating magnet creates a changing magnetic field, which induces a current to flow in the copper wire coils. This current can then be used to power electrical devices.