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MagnetismElectricity
Vocabulary for magnetism, electricity and their interrelationship
Term | Definition |
---|---|
attract | unlike poles of magnets-unlike electrical charges |
repel | Like poles of magnets - Like electric charges |
Electric Force | The attraction or repulsion between charged objects. |
Electric Circuit | A closed, conducting loop that electric charges flow continuously through. |
Electric Current | The flow of electric charge. |
An electric circuit contains | a source of electrical energy, a conductor of the electrical energy (wire) connected to the energy source, and a device transforms the electrical energy to light, sound, heat, and mechanical motion. |
Conductor | A material in which electrons can move easily from place to place. Examples are copper, iron, steel and silver |
Insulator | A material in which electrons cannot move easily from place to place. poor Examples are wood, styrofoam and air. |
Resistance | The measure of how difficult it is for electrons to flow through a material. |
Magnetism | The force of attraction or repulsion of magnetic materials. |
Magnetic Field | The space around a magnet where the magnetic force, a push or pull, is applied without actually touching an object. |
Magnetic Domain | A group of atoms with their magnetic fields pointing in the same direction. |
Generator | Produces an electric current when a coil of wire wrapped around an iron core is rotated near a magnet. Transforms mechanical to electrical energy. |
Turbine | Huge wheel that rotates when pushed by water, wind, or steam. |
Electromagnet | Formed when a wire in an electric circuit is wrapped around an iron core producing a magnetic field. The magnet that results loses its magnetism if the electric current stops flowing. |
Electric Motor | Uses an electromagnet to create movement in a machine. Transforms electrical energy to mechanical energy. |