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# Unit 6 Lessons 3-7

### Electricity - Important vocabulary to know from Unit 6 Lessons 3-7

TermDefinition
alternating current (AC) an electric current that reverses its direction at repeated intervals (for example, every 10 seconds). This is used for wiring in homes.
amperes (also known as amps) the unit for measuring electrical current; stands for amount of charges per second
battery a device that uses chemical energy to move electrical charges; it gives energy to every charge that moves through it.
current the rate of flow of electric charges; in other words, how many charges pass through a point in the circuit in one second.
direct current electrical current flowing in one direction only; this is the current in the circuits we built in class
electrical conductivity the ability of a material to conduct or carry electricity; if this is higher in a material, it conducts current very well.
electrical conductor a material that easily carries electrical current because electrons can easily move through it.
electrical insulator a material that poorly conducts current because electrons cannot easily move through it
ohm the unit of measurement for electrical resistance
Resistance the measure of an object's ability to conduct current;if this is higher in a material, it does not conduct current very well.
semiconductor material that conducts current better than an insulator but not as well as a conductor
volt The unit of measure for voltage; stands for amount of joules per charge
voltage the amount of potential energy that each unit of electrical charge has
charges these move through a circuit; each is like a group of many electrons
coulombs this is the unit for amount of charges
multimeter this is a device used to measure current, voltage, and resistance
Created by: davenportscience

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