electromagnetics

who developed the first battery (voltaic pile) or steady source of electric charge

Italian physicist questioned if electric current can be produced when two different metals are brought into contact

Alessandro Volta

this is the ability to move electric charges through a circuit (makes current possible). any device that converts some form of energy into electric energy is a source of this. (ex battery takes chemical energy and makes it electrical.)

electric potential

electric potential is measured in units of ____ per ____ or _____

joules per coulomb or volt

one volt is equal to one joule of energy for every coulomb. ____ volt means more push to move electric charge through a circuit

higher

who was the first to discover a link between electric and magnetic forces. he proved that any charge in motion created a magnetic field. (can induce magnetic field via electricity) current moved through wire and made compass needle move to point to wire

Hans oersted

flow of ______ can create a magnetic field

electrons

electrons flow through a wire produce a magnetic field that are _____ circles around the wire. curving the wire causes lines to overlap causing _____ intensity

concentric, greater

this is what a coil of wire is called. the overlap creates a stronger overlapping magnetic field. the magnetic field concentrates in the center of the coil so more coils gives more intensity, and closer coils also does.

Solenoid

this is a current carrying coil of wire wrapped around an iron core. this intensifies the induced magnetic field. the magnetic field can be adjusted by varying current through wire.

electromagnet

electromagnets are useful due to being able to strengthen or weaken magnetic field by

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increasing or decreasing electric current through wires

increasing or decreasing number of coils

increasing or decreasing size of iron core

this is when an electric current or electromotive force (emf) is induced in a circuit if some part of that circuit is in a changing magnetic field.

electromagnetic induction

this is a device for measuring an electric current through a wire in amps

ammeter