1. electric charge -- a property that causes subatomic particles such as protons and electrons to attract or repel one another; also the amount of excess or deficiency of negative or positive particles in an object.
2. electric field -- the field around charged particles that exerts a force on other charged particles.
3. Coulomb's law -- the relationship between electrostatic force, the sizes of electric charges and the distance between two objects.
4. electrostatic force -- a push or pull acting on a charge due to its interaction with an electric field.
5. attraction -- the action of two opposite charges; a pulling together due to electric fields.
6. repulsion -- the action of two like charges; a pushing away due to electric fields.
7. static -- an object or particle that is not moving. vector -- a measurement that requires a direction.
8. E = F / q -- the electric field strength formula.
9. electrical potential energy -- the amount of energy stored in the position of a charged-object in an electric field.
10. electric potential -- the amount of electric potential energy stored in each charge.
11. potential difference -- the difference in electrical potential energy between two places in an electric field.
12. voltage -- the potential difference measured in volts; the amount of work to be done to move a charge from one point to another along an electric circuit.
13. Volts -- the units for voltage, representing Joules/Coulomb.
14. Coulombs -- the units for charge. Joules -- the units for energy and work.
15. Newtons/Coulomb -- the units for electric field strength.
16. current -- the rate of flow of electric charges.
17. Amperes -- the units for current, representing Coulombs/second of flow.
18. physical current -- the (more correct) view that negative charges move from the negative pole to the positive pole through a circuit.
19. conventional current -- the (more complicated) view that positive charges move from the positive pole to the negative pole through a circuit.
20. generator -- a device used to convert mechanical energy into electric energy.
21. electric motor -- a device that converts electric energy into mechanical energy.
22. electrons -- negatively-charged subatomic particles.
23. protons -- positively-charged subatomic particles.
24. quantized -- the idea that there is a smallest unit of charge - the amount of charge found in a proton or an electron.
25. conductor -- a material that allows electric charges to flow easily.
26. insulator -- a material in which electrons are not able to move easily.
27. friction -- a process by which atoms are put in contact, facilitating the transfer of electrons from one object to another.
28. polarization -- the realignment of electric charge in a neutral insulator due to the presence of an outside electric field.
29. inverse-square law -- a physical quantity that varies inversely with the distance-squared.
30. electric field lines -- imaginary lines that represent how a positive test charge would move in the presence of the source charge; drawn in the direction of the actual electric field vectors and indicate relative strength of the field at a given point.
31. law of conservation of charge -- states that electric charge can neither be created or destroyed - only transferred.
32. electrically neutral -- an object that has equal amounts of positive and negative charges.
33. test charge -- stationary positive charge placed in an electric field to test its strength and direction.
34. magnetism -- the property of some materials in which there is a force of repulsion or attraction between certain like and unlike poles.
35. magnetic field -- the space around an object through which a magnetic force is applied; it is produced by an electric charge in motion.
36. magnetic field lines -- the map of forces around a magnetic object.
37. magnetic pole -- one of two points, such as the ends of a magnet, that have opposing magnetic qualities.
38. magnetic monopole -- a magnetic pole in isolation; it is theoretical and had never been observed.
39. magnetic force -- the attraction or repulsion between magnetic poles
40. unpaired electron -- a single electron in an electron shell; its spin can cause a the generation of a magnetic field inside an atom of iron, nickel or cobalt.
41. magnetic domains -- microscopic regions inside an object made of atoms with aligned magnetic fields.
42. electromagnetic induction -- the process of generating a flow of electric charges by moving an electrical conductor relative to a magnetic field
43. electromagnetism -- the interaction of electric currents or fields and magnetic fields.
44. electromagnets -- an object that generates a magnetic field when an electric current flows through it.
45. electromagnetic waves -- transverse waves consisting of changing electric fields and changing magnetic fields

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