Vocabulary
Define magnetic field
A region around a magnetic or electric source where forces can be detected.
A coil of wire that generates a magnetic field.
What is an electromagnet?
An electromagnet is the result of electric currents and magnetic fields interacting with each other.
This part of a generator rotates inside a magnetic field to produce electricity.
Armature
What is electromagnetism?
Identify the parts of the solenoids.
battery and wire
What are two examples of electromagnets?
A doorbell and a loudspeaker
This invisible region around a magnet or electric current affects other nearby magnetic materials or charges.
Magnetic field
What is the purpose of the right hand rule?
It makes it easy to find the direction of a magnetic current.
How can you change from a solenoid to an electromagnet?
Adding an iron nail inside the coil wire.
What are the differences between an electromagnet and a regular magnet?
Electromagnets can be turned on and off and you can change how strong they are.
What does MRI stand for?
Magnetic resonance imaging.
What is Induction?
The process of generating an electric current in a conductor by changing the magnetic field around it.
Increasing this property of a solenoid increases the strength of its magnetic field.
The number of coils (or turns) per unit length
What materials do you need to make an electromagnet?
Wire, iron core and a power source.
Who is the unit of magnetic field strength named after?
Nikola Tesla
What is magnetic force?
Electric current produced by a magnetic field.
This everyday household device uses a solenoid to control the flow of water automatically.
Washing machine
How can an electromagnet become stronger?
increasing current or using iron as a core.
Who found electromagnetism?
Hans Christian Ørsted