OBJ 1
What is the Law of Electric Charges?
Like charges repel; Opposite charges attract
What is a magnet?
Any material that attracts iron and materials that contain iron
What are electromagnets?
Magnets that run on electricity
What is Friction?
Build up of charge by rubbing one object against another
What is Static?
The build-up of charges
What is electricity?
The interaction between electric charges
What are the two magnetic poles called?
North pole and South pole
What can you build an electromagnet from?
Wire and a piece of iron
What is Conduction?
Build up of charges between 2 objects
What is an electric charge?
Electrons have a negative charge, and protons have a positive charge and their opposite charges attract
When one charged object is placed in the electric field of another charged object,
it is either pushed or pulled.
Can Magnets interact without touching?
Yes, because of the magnetic fields
What are 3 ways to increase the current in a simple electromagnet?
1. Adding a second battery
2. Add more turns/coils of wire around the nail
3. Use a bigger core
What is Induction?
One charged object induces an electric field which attracts and repels charges in the second object
An electric field is...
The region around a charged object where its electric force interacts with other charged objects.
Static Electricity can occur in 3 ways:
Friction, Conduction, Induction
The closer the lines in a magnetic field are....
the stronger the magnetic field
What does an electric current produce?
A magnetic field
What is a magnetic field?
The area of magnetic force around a magnet
True or False
The strength of the magnetic field increases as the number of loops, or coils, increases.
True
True or False
Static electricity move along a wire
False
True or False
Any material that exerts a magnetic force is considered a magnet
True
To turn the magnetic field on or off...
you simply turn the current on or off.
Magnetic poles are
The two ends of any magnet (north and south)
The magnetic field of an electromagnet is produced by..
both the current in the wire and the magnetized core