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| A stationary electric charge that is built up on a material. |
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| An object that has accumulated extra electrons. |
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| An object that is missing electrons. |
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| First Law of electrostatics |
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| Like charges repel each other and unlike charges attract. |
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| A material containing a large number of electrons which are free to move such as copper, aluminum and gold. |
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| A material with very few or no electrons free to move. |
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| A simple device used to indicate the existence of a positive or negative charge. |
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| The removal of a charge by connecting it to the earth through a conductor. |
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| The rate of flow of electrons per second that flow past a point. The symbol for current is (I) and is measured in Amperes or amp (A). |
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| The amount of energy per unit charge needed to move a charged particle from a reference point to a designated point which is measured in volts. |
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| A closed loop consisting of a source of current and one or more components around which a current flows. |
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| A path along which electrons have only one way to move in a closed loop. |
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| Where electrons have more than one path to move along around a closed loop. |
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| A measure of the difference in electric potential between two points in space, a material, or an electric circuit, expressed in volts. |
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| The ability of an object to resist or restrict the flow of a current. The unit of measurement is the ohm. |
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V = I x R
For a given voltage, higher resistance entails lower current flow.
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| Any of various solid substances, such as silicon or germanium, that conduct electricity more easily than insulators but less easily than conductors. |
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| A region around a magnet in which objects are affected by the attractive force. |
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| The point on a magnet at which the magnetic forces are more concentrated. |
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| A magnet produced by the electric current in the coiling of wire around some material. |
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| A device that converts mechanical energy into electrical energy using electromagnetism. |
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| A device used to change the voltage of an alternating current in one circuit to a different voltage in a second circuit, thus high and low voltage currents can be transmitted. |
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| A device which transforms electric energy from an electromagnet to mechanical energy that rotates. |
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