Magnatism. And Electricty. Revision Flashcards
Ammeter
A device for measuring electric current in a circuit.
Amps
Units of measurement of electric current, symbol A.
Atom
A neutral particle; everything is made of atoms.
Attract
Be pulled together, for example, opposite poles of a magnet attract and positive and negative charges attract.
Battery
Two or more electrical cells joined together.
Cell
A chemical store of energy, which provides the push that moves charge around a circuit.
Conductor
A material that conducts charge or energy well, such as a metal or graphite.
Core
A rod of a magnetic material placed inside a coil to make the magnetic field of an electromagnet stronger.
Current
The flow of electrical charge (electrons) around a complete circuit per second.
Electric charge
A property of a material or particle that can be positive or negative.
Electric field
A region where a charged material or particle experiences a force.
Electromagnet
A temporary magnet produced using an electric current.
Electron
negatively charged particle found in atoms. Electrons flow through a wire when a current flows.
Insulator
A material that does not conduct electricity or transfer energy well.
Lightning
A current through the air that produces light and sound
Magnetic field
A region where there is a force on a magnet or magnetic material.
magnetic field lines
Imaginary lines that show the direction of the force on magnetic material.
magnetic material
A material that is attracted to a magnet, such as iron, steel, nickel, or cobalt.
Magnetise
Make into a magnet.
Motor
A component or machine that spins when a current flows through it.
Negative
The charge on an electron, or on an object that has had electrons transferred to it.
Neutral
Describes an object or particle that has no charge, or in which positive and negative charges cancel out, giving no charge overall.
neutron
A neutral particle found in atoms.
North pole
The pole of a magnet that points towards the north.
