Electromagnetism Flashcards
magnetism produced by electricity
electromagnetism
he observed that a dissected frog leg twitched when touched by two different metals
luigi galvani
he discovered battery/voltaic pile
alessandro volta
it is any device that converts some form of energy directly into electric energy
source of electromotive force
a danish physicist, he demonstrated that electricity can be used to generate magnetic fields and electrons move to negative to positive
hans oersted
an electric current will be induced to flow in a circuit if some part of that circuit is in changing magnetic field
electromagnetic induction
4 electromagnetic devices
electric motor
electric generator
transformer
rectifiers
it is a device where electric current produces mechanical motion
electic motor
it is a device where mechanical motion produces electric current
electric generator
it is a device where it changes the intensity of alternating voltage and current
transformer
it is a law where the change in voltage is directly proportional to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil
transformer law
3 types of transformer
closed core
autotransformer
shell type
it is a type of transformer, a square core of ferromagnetic materials built up of laminated layers of iron
closed core transformer
it is a type of transformer that consists of one winding of wire and varies in voltage and current by self induction
autotransformer
it is a type of transformer that confines more of the magnet field lines of the primary winding
shell type transformer
it changes alternating current to direct current
electrifiers
two type of electrifiers
vacuum type and solid state
what do you call an each zinc copper sandwich?
cell of battery
in battery, modern dry cells us a ____ cord as the positive electrode surrounded by an electrolytic paste housed in a negative zinc _____ can
in battery, modern dry cells us a carbon cord as the positive electrode surrounded by an electrolytic paste housed in a negative zinc cylindrical can
a coil of wire is called a ____
a coil of wire is called a solenoid
it is a ferromagnetic materials wrapped in a coil of wire
electromagnet
