Magnets and Magnetism 1
A material that attracts iron, steel, or a mixture of metals?
What is a magnet
What are the two ends of a bar magnet called?
North and South Poles
the study of the interaction between electricity and magnetism
What is electromagnetism
What do scrapyards, doorbells, and the speakers at a rock concert have in common?
They all have devices that contain electromagnets in them!
What 3 properties do all magnets have?
1) They have a north pole and a south pole 2) They are surrounded by a magnetic field 3) Like poles repel and opposite poles attract.
In magnetic forces, like poles ______________ and opposite poles ______________
Like poles repel (push apart) and opposite poles attract (stick together)
How does an Electric Generator work?
It uses kinetic/mechanical energy to generate electrical energy.
The region around a magnet where the magnetic force can act
What is a magnetic field
What is the type of metal used to create a simple electromagnet?
Possible answers:
Copper
Silver
Aluminum
Steel
A coil of copper wire wrapped around an iron core connected to an electric source is called.
What is an electromagnet
What is the definition of an electro magnet?
When an electric current flows through a wire, it generates a magnetic field.
How do you increase or decrease the strength of a magnetic field?
When the conductive wire is coiled more closely together, the magnetic field increased. The magnetic field is decreased when the conductive wire is coiled more loosely.
What is an electric motor?
A device that changes electrical energy into mechanical energy.
What are the differences between a Permanent Magnet and a Temporary Magnet?
Permanent magnets are those that have magnetic fields that are permanent (those on your fridge and on the whiteboard). Temporary ones have magnetic fields that only work when an electrical current is flowing.
Explain the "Right Hand Rule"
When you take your right thumb to point in the direction of the electric current, the rest of your fingers will point in the direction of the rotation of the magnetic field.
What is the term used to describe converting mechanical energy into electrical energy
Induction, or Electromagnetic Induction.
What kind of animals are affected my magnetism?
Magnets have been used to study bee communication patterns, migratory cycles and several other animal behaviors. This is because many animals can sense magnetic fields. For instance, some sharks are repelled by them and birds and turtles navigate by them.