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Electric charge and

Lessons 1-5

TermDefinition
electric charge a property that leads to electromagnetic interactions between the particles that make up matter
static electricity the buildup of electric charge on an object
electrical conductor a material through which charges can move freely
electrical insulator a material through which charges cannot move easily
semiconductors a special class of materials that conduct electric charge better than electrical insulators but not as well as electrical conductors
electric current The rate of flow of electric charges
voltage the amount of work required to move each unit of charge between two points
electric circuit closed path through which electric charges can flow
series circuit all parts are connected in a row that forms one path for the electric charges to flow
parallel circuit electric charges have more than one path they can follow
magnet to describe any material that attracts iron or objects made of iron
magnetic force when you bring two magnets together, they exert a push or pull
magnetic poles the ends of a magnet
magnetic field the area surrounding a magnetic where magnetic forces can be detected
electromagnetism results when electric currents and magnetic fields interact with each other
solenoid a coil of wire that carries an electrical current
electromagnetic wrapping a solenoid around an iron core
electric motor changes electrical energy into mechanical energy
electromagnetic induction using a magnetic field to create an electric current in a wire
transformer use induction to increase or decrease the voltage of alternating current
electric generator use induction to change mechanical energy into electrical energy
resistance opposition to the flow of electric charge.
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