# Electrical Sciences Basic

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1. Consists of a positively charged nucleus surrounded by negatively charged electrons
Atom
2. The ability to store an electric charge
Capacitance
3. The measure of an ability to conduct current
Conductance
4. Materials with electrons that are loosely bound to their atoms, or materials that permit free motion of a large number of electrons
Conductors
5. The movement or flow of electrons. Also called electron current flow
Current
6. A special force acting between the charged electron and proton
Electrostatic field
7. The force that causes the electron and the nucleus to attract each other, and holds the atom together
Electrostatic force
8. The negative charge of the electron is equal, but opposite to, the positive charge of the proton
First law of electrostatics
9. Valence electrons that leave the atom if enough energy is applied to the atom
Free electrons
10. A theoretical concept of an electric current or voltage supply that has no losses and is a perfect voltage or current supply
Ideal source
11. The ability of a coil to store energy, induce a voltage in itself, and oppose changes in current flowing through it
Inductance
12. 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
13. Applied voltage equals circuit current times the circuit resistance
Ohm’s law
14. How large the electrostatic force is between two charged objects
Potential difference
15. The rate at which work is done, or the rate at which heat is generated
Power
16. A real life current or voltage supply that has some losses associated with it
Real source
17. The opposition to current flow
Resistance
18. Materials that conduct electricity but offer opposition to current flow
Resistors
19. 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)
20. 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
21. The sum of the potential differences of all charged particles in the electrostatic field
Electromotive force (EMF)
22. An atom that has lost or gained one or more electrons is said to have an
Ion Charge
23. Dash Line in drawing
Conventional Flow
24. Flow of electrons from negative to positive.
Electron Flow
25. • a. Direct Current
• b. Alternating Current
26. The opposition to alternating current flow
Impedance
 Author: ereim ID: 29412 Card Set: Electrical Sciences Basic Updated: 2010-08-11 15:12:28 Tags: Basic Electric Theory Folders: Description: Basic Show Answers: