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Unit 3, 1-4
| Question | Answer |
|---|---|
| electric charge | charge: the quantity of unbalanced electricity in a body (either positive or negative) and construed as an excess or deficiency of electrons; "the battery needed a fresh charge" |
| static electricity | a stationary electric charge, typically produced by friction, that causes sparks or crackling or the attraction of dust or hair. |
| electrical conduct | In physics and electrical engineering, a conductor is an object or type of material which permits the flow of electric charges in one or more directions |
| electrical insulator | An electrical insulator is a material whose internal electric charges do not flow freely, and therefore does not conduct an electric current under the influence of an electric field |
| semiconductor | a solid substance that has a conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects |
| electric current | current: a flow of electricity through a conductor |
| resistance | the degree to which a substance or device opposes the passage of an electric current, causing energy dissipation. |
| voltage | an electromotive force or potential difference expressed in volts. |
| electrical curcuit | circuit: an electrical device that provides a path for electrical current to flow |
| series curcuit | a circuit having its parts connected serially |
| parallel circuit | a closed circuit in which the current divides into two or more paths before recombining to complete the circuit |
| magnet | a piece of iron (or an ore, alloy, or other material) that has its component atoms so ordered that the material exhibits properties of magnetism, such as attracting other iron-containing objects or aligning itself in an external magnetic field. |
| magnetic pole | each of the points near the extremities of the axis of rotation of the earth or another celestial body where a magnetic needle dips vertically. |
| magnetic feild | a region around a magnetic material or a moving electric charge within which the force of magnetism acts. |
| magnetic force | magnetism: attraction for iron; associated with electric currents as well as magnets; characterized by fields of force |
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18cheern0930
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