electromagnetism 1
Conventional current flows from the ________ terminal to the _______ terminal
positive, negative
Opposite poles of magnets __________
attract
Like poles of a magnet _________
repel
Compasses point in what direction?
north
A coil of wire acting as a magnet when carrying electric current
solenoid
Materials that allow the electrons to flow through them
Conductors
The area around a magnet where the force is exerted
magnetic field
To construct an electromagnet you need an iron core, a power source, and ____
wire
How you can tell if a metal is showing resistance
Heat and/or light
Name a way to increase the strength of an electromagnet
number of coil wrappings, using a larger iron core
True of False: All metals stick to magnets
Magnetic field lines flow from the __________ pole to the _________pole
North, South
A device that stores electrical charge
cell
These are groups of atoms which have aligned themselves to all face in the same direction
domains
Charging an object by allowing it to come into contact with an object that already has an electrical charge.
Conduction
Charging an object by rubbing to items together to transfer electrons
Friction
Process of generating electric current with a changing magnetic field is called
electromagnetic induction
Magnetism produced by electric current is known as ______________
electromagnetism
When a wire is exposed to a changing magnetic field, this is produced
electric current