Studied by 5 peopleTurbine
________: a large wheel that rotates when pushed by water, wind, or steam.
Hans Christian Oersted
In 1820, ________, a Danish physics teacher, found that electricity and magnetism are related.
Power plants
________ commonly produce alternating current because the voltage can be increased or decreased with transformers.
Transformer
________: a device that increases or decreases the voltage of an alternating current.
solenoid
If the ________ is wrapped around an iron core, an electro- magnet is formed.
Electromagnet
________: a temporary magnet made by wrapping a wire coil carrying a current around an iron core.
electrical energy
The alternator provides ________ to operate lights and other accessories.
Electromagnetic Induction
________: The generation of a current by a changing magnetic field.
Galvanometers
________: devices that use an electromagnet to measure electric current.
Generator
________: uses electromagnetic induction to transform mechanical energy into electrical energy.
electric motors
Both generators and ________ use magnets to produce energy conversions between electrical and mechanical energy.
Solenoid
________: A single wire wrapped into a cylindrical wire coil.
galvanometer
In a(n) ________, the electromagnet is connected to a small spring.
Electromagnets
________ are temporary magnets because the magnetic field is present only when current is flowing in the solenoid.
secondary coil
In a step- up transformer the number of wire turns on the ________ is greater than the number of turns on the primary coil.
Electric Motor
________: a device that changes electrical energy into mechanical energy.
transformer
A(n) ________ is made of a primary coil and a secondary coil.
transformer
A(n) ________ that decreases the voltage so that the output voltage is less than the input voltage is a step- down ________.
Magnetism
refers to the properties and interactions of magnets
Magnetic Field
exerts a force on other magnets and objects made of magnetic materials
Magnetic Poles
where the magnetic force exerted by the magnet is strongest
Magnetic Domains
The groups of atoms with aligned magnetic poles
Electromagnet
a temporary magnet made by wrapping a wire coil carrying a current around an iron core
Solenoid
A single wire wrapped into a cylindrical wire coil
Galvanometers
devices that use an electromagnet to measure electric current
Electric Motor
a device that changes electrical energy into mechanical energy
Direct current
flows only in one direction through a wire
Alternating Current
reverses the direction of the current in a regular pattern
Transformer
a device that increases or decreases the voltage of an alternating current
Note 
Flashcard (85)