Tulosähkövirta

Tulosähkövirta, also known as induced current, is an electric current that is produced in a conductor when it is exposed to a changing magnetic field. This phenomenon is described by Faraday's law of induction. When a magnetic field changes its strength or direction through a closed circuit, a voltage is generated across the circuit, which in turn drives an electric current. The direction of the induced current is governed by Lenz's law, which states that the induced current will flow in a direction that opposes the change in magnetic flux that produced it.

Tulosähkövirta has numerous practical applications. It is the fundamental principle behind electric generators, which convert mechanical energy into electrical energy by rotating a coil of wire within a magnetic field. Transformers, essential for altering voltage levels in power transmission, also rely on induced currents. Furthermore, induced currents are utilized in induction cooktops, where they heat cookware directly, and in metal detectors, which identify metallic objects by sensing the magnetic fields they induce. In contrast, eddy currents, a form of tulosähkövirta that occurs in bulk conductors, can sometimes be an unwanted effect, leading to energy loss through heating in electrical machinery.