Physics-18 Electromagnetic induction prequiz

Induced EMF - It can be defined as the generation of a potential difference in a coil due to the changes in the magnetic flux through it. In simpler words, electromotive force or EMF is said to be induced when the flux linking with a conductor or coil changes.

Electromagnetic or magnetic induction is the production of an electromotive force (emf) across an electrical conductor in a changing magnetic field.

Fleming's right hand rule is used to determine the direction of induced current in a coil. If the thumb (direction of motion), index finger (along magnetic field) and middle finger are held mutually perpendicular as shown in the figure, then middle finger gives the direction of induced emf in the wire.

An AC generator is a machine that converts mechanical energy into electrical energy, generated as an alternating current sinusoidal output waveform.

1. A slip ring is a ring in a dynamo or electric motor which is attached to and rotates with the shaft, passing an electric current to a circuit via a fixed brush pressing against it.

1. Lenz's law is a law stating that the direction of an induced current is always such as to oppose the change in the circuit or the magnetic field that produces it.

1. Power lines is a cable carrying electrical power, especially one supported by pylons or poles.

A transformer is an apparatus for reducing or increasing the voltage of an alternating current.

Definitions of primary coil. coil forming the part of an electrical circuit such that changing current in it induces a current in a neighboring circuit. synonyms: primary, primary winding.

Definitions of secondary coil. coil such that current is induced in it by passing a current through the primary coil. synonyms: secondary, secondary winding. type of: coil. reactor consisting of a spiral of insulated wire that introduces inductance into a circuit.