Lesson 1
a property that leads to electromagnetic interactions between the particles that make up matter.
electric charge
The rate of flow of electric charges
electric current
a complete, closed path through which electric charges can flow.
electric circuit
any material that attracts iron or objects made of iron.
magnet
when electric currents and magnetic fields interact with each other.
electromagnetism
the buildup of electric charge on an object.
Static electricity
the amount of work required to move each unit of charge between two points.
Voltage
a device that uses electrical energy to operate.
load
When you bring two magnets together, they exert a push or pull
magnetic force
A coil of wire that carries an electric current, and therefore produces a magnetic field
solenoid
a material through which charges can move freely.
electrical conductor
The opposition to the flow of electric charge
resistance
a device that turns electrical devices on and off.
Switch
Two magnets can push each other apart because of their ends
magnetic polls
Wrapping a solenoid around an iron core makes an ( )
electromagnet
a material through which charges cannot move easily.
Electrical insulator
charges always flow in the same direction.
Direct current
all parts are connected in a row that forms one path for the electric charges to follow.
series circuit
The area surrounding a magnet where magnetic forces can be detected
magnetic field
changes electrical energy into mechanical energy
electric motor
a special class of materials that conduct electric charge better than electrical insulators but not as well as electrical conductors.
semiconductors
charges repeatedly shift from flowing in one direction to flowing in the reverse direction.
Alternating current
electric charges have more than one path that they can follow.
Parallel circuit
A material that can be turned into a magnet
ferromagnetic
Using a magnetic field to create an electric current in a wire
electromagnetic induction