chapter 6&7 vocab science Flashcards
(20 cards)
Static Electricity
the accumiation of excess electric charge on an objectv
law of conservation of charge
charge cab be transferred from object to object, but it cannot be created or destroyed
electric field
surrounds every electric charge and exerts the force that causes other electric charges to be attracted or repelled
conductor
a material through which electrons move easily
electric current
the net movement of electric charges in a single direction
voltage difference
related to the force that causes electric charges to flow
electric circuit
a closed path that electric current follows
resistance
measured in ohms, is the tendency for a material to resist the flow of electrons and to convert electrical energy into other forms of energy, such as thermal energy.
ohms law
the current in a circuit equals the voltage divided by the resistance
series circuit
an electric circuits with only one branch
parallel circuits
contain two or more branches for current
magnetism
the properties and interactions of magnets
magnetic field
a region of space that surrounds a magnet and exerts a force on other magnets and objects made of magnetic materials
magnetic poles
the regions of a magnet that exert the strongest force
magnetic domains
groups of atoms with alligned magnetic poles
electromagnetic field
the attractive or repulsive for between electric charge and magnets
electromagnetism
the interaction between elctric charges and magnets
electromagnetism
the generation of an electric current by changing the magnetic field
direct current
electric current that is always in one direction through a wire
alternating current
electric current that reverses the direction in a regular pattern
