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Electricity Unit Test
N/A
26
Science
8th Grade
11/05/2013

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Cards

Term
Diode
Definition
Electronic device that allows current to flow in only one direction
Term
Voltage
Definition
Pressure behind the flow of electrons in a circuit
Term
Short Circuit
Definition
Electricity can go straight through and back to the source- Short cut
Term
Circuit
Definition
Closed loop of conductors through which old charges can flow
Term
Polarity
Definition
The positive (+) and negative (-) markings on a battery
Term
Generator
Definition
Device for producing electrical current by moving a coil of wire in a magnetic field
Term
Resistance
Definition
The electrical friction between an electric current and the material it is flowing through
Term
Sound
Definition
A variation in air pressure created by a mechanical vibration *Sound travels in waves
Term
Ohm
Definition
The unit of measure for resistance
Term
Schematic
Definition
A drawing of an electrical circuit that uses symbols for all the components
Term
Parallel Circuit
Definition
Circuit in which the currents are divided into two or more paths and then returns via a common path to complete the circuit
Term
Series Circuit
Definition
Circuit connected so that current passes through each circuit element in turn without branching out. If there are two bulbs, and you remove one, the other won't work
Term
Motor
Definition
A machine that converts electrical energy into mechanical energy
Term
Fuse
Definition
A special wire that breaks when too much current flows through it
Term
Resistor
Definition
Components used to control the flow of electricity such as a lamp or a motor
Term
Speaker
Definition
A device which converts electrical energy into sound
Term
LED
Definition
A one way, low-current meter. More sensitive than regular light bulbs
Term
Photo Resistor
Definition
Electronic parts made with light-sensitive materials that change their resistance when light shines on them. Their resistance decreases as the light becomes brighter
Term
Battery
Definition
Creates an electrical charge across wires by using a chemical reaction. Top: Cathode Bottom: Anode
Term
Wire
Definition
Usually made of metals such as copper that offer very low resistance to the flow of electricity
Term
Switch
Definition
Device to connect or disconnect wires in an electric circuit
Term
Circuit Board
Definition
Components and wires in electrical devices are mounted to circuit boards
Term
Incandescent
Definition
Lamp that creates light using a material that is heated until it glows
Term
Fluorescent
Definition
Creates light using glowing gas
Term
Compact Fluorescent
Definition
Saves energy and money. Drawback- disposal of mercury gas inside
Term
Static Electricity
Definition
Electricity that is produced by rubbing two objects together- transfer of electrons
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