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