T3 magnetism Flashcards
what does a permanent magnet produce
It’s own magnetic field
what is an induced magnet
object that becomes a magnet when it is placed In a magnetic field
what are the 4 types of magnetic material
iron
steel
cobalt
nickel
what is a magnetic field
region around a magnet where a force acts on another magnet
what can a direction of magnetic field be found from
compass
what can you do the Increase the strength of a magnetic field
Coil the wire
What is coiling a wires shape called
Solenoid
what 2 things can increase the strength of the magnetic field
More turns of coil
Place iron inside
What is a solenoid containing an iron core called
Electromagnet
what does the Fleming left hand rule represent
Thumb - motion
First finger - field (N to S)
middle finger - current
what is the motor effect
when the wire is carrying current and experiences a force in magnetic field
What can you use to switch the direction of current back to 90°
Use a split ring commutator
What is a split ring commutator
A split metal ring which is connected to conducting brushes which allow electric current to pass
