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Unit 6 Lessons 3-7
Electricity - Important vocabulary to know from Unit 6 Lessons 3-7
| Term | Definition |
|---|---|
| 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 |
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davenportscience
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