Fields Flashcards
(25 cards)
Gravitational field
Region surrounding a mass in which any other mass will experience a force of attraction due to gravity
As latitude increases gravitational field
Increases
As altitude increases gravitational field
Decreases
Free fall
-only force acting on a falling object is gravity
-will have a constant acceleration
Electric field
Region of space around a charge where another charge will experience a force
Electric Field intensity
Amount of electric force per coulomb of charge
Elementary charge
Charge on a single proton or electron
Law of magnetic poles
-exert force on each other
-opposite poles attract
-like poles repel
Domain theory of magnetism
Ferromagnetic materials are composed of a large number of tiny magnetic domains
Magnetic domains
Tiny bar magnet, with its own north and south poles
Magnets
-have poles
-magnets attract some metals
-each half of a magnet has its own north and south pole (cut a magnet in half)
Magnetic field
Region surrounding a magnet
If you were to break a magnet in half what would happen?
It would turn into 2 smaller magnets
Permanent magnets and Temporary magnets
Permanent: remain magnetized
Temporary: lose magnatism
Earths magnetic field
A large bar magnet, with its south pole in the northern hemisphere
Electromagnetism
Electric currents produce a magnetic field
Solarwind
Consists mainly of protons and electrons emitted by the sun
Auroras
Caused by high energy particles from solar wind that are trapped in the Van Allen belts of earths magnetic field
Solenoid
A long wire is wound into a spiral with many loops
Right-hand rule #1
-Thumb is the current
-fingers are the magnetic field
Right-hand rule #2
Thumb will point in the direction of the magnetic field lines inside the loop
Right-hand rule #3
-thumb is current
-fingers are magnetic field
-palm pushes in the direction of the magnetic force
Ferromagnetic
Materials that are not normally magnetic
Magnetic inclination
Angle between earths magnetic field and horizontal
