Studied by 14 people
electric conductor
material in which electric charges easily move
electric discharge
loss of an unbalanced electric charge
electric field
invisible region around a charged object where an electric force is applied
electric force
a force that two electrically charged objects apply to each other
electric insulator
material in which electric charges cannot easily move
electrically charged
having an unbalanced amount of positive charge or negative charge; positively charged objects have lost electrons and negatively charged objects have gained electrons
electrically neutral
having equal amounts of positive charge and a negative charge
nucleus
small, dense region consisting of protons and neutrons at the center of an atom
charge
definite quanity of electricity
electric circuit
closed, or complete path in which an electric current flows
electric current
movement of electrically charged particles
electric resistance
measure of how difficult it is for an electric current to flow in a materal
generator
machine that transforms mechanical energy to electric energy
light
electromagnetic radiation you can see
voltage
amount of energy used to move one coulomb of electrons through the circuit
electromagnet
temporary magnet made with a current-carrying wire coil wrapped around a magnetic core
magnet
an object that attracts iron and other materials that have magnetic qualities similar to iron
magnetic domain
region in a magnetic material in which the magnetic fields of the atoms all point in the same direction
magnetic force
push or pull a magnetic field applies to either a magnetic material or an electric current
magnetic material
material that is attracted to a magnet
soft magnetic material
loses its magnetic field quickly (e.g. iron)
hard magnetic material
keeps its magnetic field for long periods of time (e.g. mixtures of iron, nickel, cobalt & other elements; also naturally occurring lodestone)
direct current
electric charges continually flow from the negative side of the source to the positive side
alternating current
the flow of electric changes direction many times per second
simple circuit
contains a source of electric energy (battery), an electric device (light bulb, buzzer), an electric conductor (wire), and often a switch
series circuit
electrical path that has only one way that an electric current can flow
parallel circuit
electrical path where each device connects to the electric source separately
coulomb
equal to 6 quintillion electrons
magnetic field
a region surrounding a magnetic material or a moving electric charge within which the force of magnetism acts
magnetic poles
places on a magnet where the magnetic field lines are closest together; field lines point away from the north and toward the south ends of a magnet
Earth's magnetic field
results from flowing molten iron and nickel in the outer core
permanent magnets
naturally occurring magnetite or a man-made of mixture of iron, nickel and cobalt that is irreversibly magnetized
Note 
Flashcard (31)