# Electrical Sciences Basic

 Consists of a positively charged nucleus surrounded by negatively charged electrons Atom The ability to store an electric charge Capacitance The measure of an ability to conduct current Conductance Materials with electrons that are loosely bound to their atoms, or materials that permit free motion of a large number of electrons Conductors The movement or flow of electrons. Also called electron current flow Current A special force acting between the charged electron and proton Electrostatic field The force that causes the electron and the nucleus to attract each other, and holds the atom together Electrostatic force The negative charge of the electron is equal, but opposite to, the positive charge of the proton First law of electrostatics Valence electrons that leave the atom if enough energy is applied to the atom Free electrons A theoretical concept of an electric current or voltage supply that has no losses and is a perfect voltage or current supply Ideal source The ability of a coil to store energy, induce a voltage in itself, and oppose changes in current flowing through it Inductance Materials with electrons that are tightly bound to their atoms and require large amounts of energy to free them from the influence of the nucleus Insulators Applied voltage equals circuit current times the circuit resistance Ohm’s law How large the electrostatic force is between two charged objects Potential difference The rate at which work is done, or the rate at which heat is generated Power A real life current or voltage supply that has some losses associated with it Real source The opposition to current flow Resistance Materials that conduct electricity but offer opposition to current flow Resistors Basic unit of measure for potential difference. The pressure or force that causes electrons to move in a conductor. Also called electromotive force (EMF). Voltage (V) Given any two of the three component values of Ohm’s Law, DETERMINE the unknown component value R I V PResistance x Current = VoltageCurrent x Voltage = Power The sum of the potential differences of all charged particles in the electrostatic field Electromotive force (EMF) An atom that has lost or gained one or more electrons is said to have an Ion Charge Dash Line in drawing Conventional Flow Flow of electrons from negative to positive. Electron Flow a. Direct Currentb. Alternating Current The opposition to alternating current flow Impedance Authorereim ID29412 Card SetElectrical Sciences Basic DescriptionBasic Updated2010-08-11T15:12:28Z Show Answers