a device for reversing the direction of a current.
What is Commutator?
100
the region of a magnet toward which the lines of magnetic induction converge (south pole) or from which the lines of induction diverge (north pole)
What is Magnetic Poles?
100
Electricity . an electric device consisting essentially of two or more windings wound on the same core, which by electromagnetic induction transforms electric energy from one set of one or more circuits to another set of one or more circuits such that the frequency of the energy remains unchanged while the voltage and current usually change.
What is Transformers?
100
Electricity . an electric current of constant direction, having a magnitude that does not vary or varies only slightly. Abbreviation: dc
What is Direct Current?
100
an electric current that reverses direction at regular intervals, having a magnitude that varies continuously in sinusoidal manner. Abbreviation: ac
What is Alternating Current?
200
a vector quantity from which is determined the magnitude and direction of the force (electric force) on a charged particle due to the presence of other charged particles, accelerated charged particles, or time-varying currents.
What is Electric Fields?
200
a region of space near a magnet, electric current, or moving charged particle in which a magnetic force acts on any other magnet, electric current, or moving charged particle.
What is Magnetic Fields?
200
a device consisting of an iron or steel core that is magnetized by electric current in a coil that surrounds it.
What is Electromagnet?
200
a portion of a ferromagnetic material where the magnetic moments are aligned with one another because of interactions between molecules or atoms.
What is Magnetic Domain?
200
Production of an electric current by changing the magnetic field enclosed by an electrical circuit. The most common use of electromagnetic induction is in the electric generator.
What is Electromagnetic Induction?
300
a property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat: equal to the voltage across the conductor divided by the current flowing in the conductor.