Magnetism Flashcards
Like poles ______________; Unlike poles _________.
Repel; Attract
Outside the magnet, a magnetic field runs _________ to ______________.
North to South
Inside the magnet, a magnetic field runs _____________ to ______________.
South to North
The pathways in a magnetic field always form ______________ _____________.
complete loops (they do not start and end)
All magnetic fields are produced by what?
the motion of an electric charge
Billions of atoms all aligned magnetically
A Domain
When all the domains are lined up, what do we get?
A magnet
T/F: Magnets are permanent.
False. Impact and manipulation can cause the atoms to become disorganized
What rule can we use to determine the direction of the current through a wire?
Right-Hand Rule: Imagine your hand around the wire, fingers circling the wire in the same direction as the magnetic field. Extend your thumb and it points to the direction of the current.
These use superconducting coils to produce extremely strong magnets.
Electromagnets
A magnetic field will create a force that is _____________ to the field and the motion of the charge.
Perpendicular
A magnetic field produces electricity
Electromagnetic Induction
What has to occur between a loop and a magnet in order for induction to occur?
Relative Motion
The faster the relative motion between a loop and a magnet, the more ___________ is created.
Current
The amount of current produced in induction depends on what two things?
How fast the motion takes place
How many loops there are
