Studied by 8 people
Magnets
Made up of conductors
Magnetic domains
What do the arrows in a magnetic domain represent?
The direction of spin for valence electrons
Ferromagnetic
Conductor that becomes a magnet once inside a magnetic field
Magnetic declination
Difference in angle between geographic and magnetic north/south
Solenoid
A coil or loop of wire (needs a current)
Electromagnet
Magnet when there is a current in a wire
Velocity selector questions
Motion of ion in a straight line (forces must balance)
Mass spectrometer questions
Find the radius of the path for a charge
Faraday’s Law
Any change in flux will induce a current in that conductor
Magnetic flux
The number of magnetic field lines that pass through a conductor
When the wire is parallel to B field there is ____ flux
little to no
When the wire is perpendicular to B field there is ____ flux
max
Lenz’s Law
A current induced in a conductor produces a B field opposite the first
Motional emf
A voltage is created in a conductor because of a change in flux
What are the results of a change in flux?
A voltage is created, there is an induced current and B field opposite the first
Transformers
Change the voltage of an AC supply
For transformers, what relationship is there between the voltage and the number of loops?
Direct
For transformers, what relationship is there between the voltage and current?
Indirect
What does AC create?
A change in flux
Motor
Changes electrical energy into mechanical energy
Generator
Changes mechanical energy into electrical energy
What causes magnetism inside the atom?
The electrons’ movement is able to generate a current and creates magnetism
What is the unit of magnetic declination?
Degrees
Note
Flashcard