Explain the following electrical terms:
       
1 volt A unit of potential difference, or a unit of measurement of electrical pressure or force. Abbreviated V.
2 ampere A unit measuring the strength of an electrical current, based on the number of electrons transferring past a given point per second. Abbreviated amp.
3 watt Unit that measures electrical power at the point where it is used in a circuit. One watt of power equals one volt of pressure times one ampere of current.  Abbreviated W
4 ohm A unit of measurement for electrical resistance to a current.

Ohm's law states that the pressure of  one volt will cause a current of one ampere to flow through a resistance of one ohm
(Voltage= Current X Resistance)
This simple formula shows the relationship between volts, amperes, and resistance in any electric circuit.
Ohms Link
5 resistance, The opposition against the free transfer of electrons in a conductor. Measured in ohms.  
6 potential difference In electrical engineering, electrical potential difference is the voltage present between two points,  
7 rectifier A device that is used to convert AC current into DC current by only allowing current to flow in one direction.  
8  rheostat A rheostat is a simple device used to control the electrical current in a circuit by inserting a length of high-resistance wire or other resistive material. The resistance of a rheostat is measured in ohms.

Another name for a rheostat is a potentiometer.  Where would you see one?? Volume controls on older TVs and radios.

  
9 conductor A substance or device through which electricity passes. Most metals are good conductors of electricity -- that is, they allow electricity to travel through them with little resistance.  
10 ground To connect any part of an electrical wiring system to the ground or to another conducting body, such as a metal water pipe or a metal rod driven into the earth.  
11 circuit  A loop-shaped path through which electric current travels from the source through some device using electricity (the load), such as a light bulb, and back to the source.  
12 short circuit. A completed, low-resistance circuit that allows electrons to follow a shorter, unintended path back to the power source rather than follow the longer path that goes through the load. Occurs when bare wires touch each other; often results from worn insulation.