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49 Cards in this Set

  • Front
  • Back
atom
The smallest particle of an element that still retains the properties of that element.
charging by conduction
The process of transferring charge through contact between two materials.
charging by induction
The process of rearranging an object's electrons by bringing a charged object near it.
conductor
A material that allows its electrons to move freely.
Coulomb's Law
A law that states that like charges repel while opposite charges attract, and that the closer two charges are together, the larger the force between them.
current
The movement of electric charge.
electric field
A force field produced by electrically charged objects.
electron
A tiny, negatively charged particle that orbits an atom's nucleus.
insulator
A material that holds tightly to its electrons.
inverse square law
A law in which the denominator has a value that's squared.
law of conservation of charge
A law that says that the total amount of charge in the universe doesn't change.
model
A simplified representation used to explain the workings of a real-world system or event.
neutron
A particle with no charge that lives inside an atom's nucleus.
proton
A positively charged particle that lives inside an atom's nucleus.
semiconductor
A material that acts like a conductor under special circumstances.
static
Stationary, or fixed in place.
static electricity
The accumulation of excess electrical charge.
superconductor
A substance that has no resistance to conducting an electric current.
ampere
The unit of current.
circuit
A closed path where electric current can flow.
circuit board
A board on which electronic components and their interconnecting circuits are mounted.
circuit breaker
A piece of flexible metal that, when it carries too much current, flips and shuts down its circuit.
conventional current
The accepted direction of current flow, from positive to negative.
electric power
The amount of energy an electrical device uses in one second.
filament
The tiny wire that connects the two larger wires in a light bulb. This tiny wire is what glows to give off light.
fuse
A safety device placed in an electric circuit that melts and breaks the circuit whenever it gets too hot.
hydroelectric power
Electric power produced by water falling over a dam in a river.
ohm
The unit of resistance.
Ohm's Law
Current is proportional to the voltage and inversely proportional to the resistance. Also known as V = I x R.
open circuit
A circuit that has an opening that prevents current from completing a complete loop.
parallel circuit
A circuit in which multiple paths exist for current to flow.
resistance
The tendency for a material to oppose the flow of electrons.
resistor
A device that resists the flow of current through a circuit.
series circuit
A circuit in which resistors are arranged one after the other, in series, and current has a single path it can follow.
short circuit
A case in which two conductors accidentally touch and all resistance in a circuit is bypassed. It causes a very high current and can produce hazardous conditions.
switch
A lever used to open and close a circuit, turning it off or on.
voltage
A quantity related to electric fields that makes electric charges want to move. Also known as potential difference.
anatomist
An expert in the study of anatomy.
electric motor
A device that converts electrical energy to mechanical energy.
electromagnet
An object that becomes magnetized only when electricity flows through it.
electron domains
Atoms whose magnetic poles can align with those around them.
generators
Devices that convert mechanical or heat energy to electric energy.
magnetic
Having the ability to attract iron or steel.
magnetic field
A region of space that interacts with magnets and produces forces of attraction and repulsion.
north pole
The end of a magnet out of which magnetic field lines point.
permanent magnet
A material that always stays magnetized.
serendipitous
Discovered by accident.
south pole
The end of a magnet into which magnetic field lines point.
temporary magnet
A metallic object whose electron domains temporarily align due to an external magnetic field.