# Chapter 2 Electricity!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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1. Electric Circuit
a closed path where electrons powered can flow through

Ex. Remember when we drew circuits in class, think of those
2. Voltaic Cell
source of energy that generates an electric current by chemical reactions involving, two different metals or metal compounds.

3. Battery
a connection of two or more cells

4. Electrode
one of two metal terminals in a cell or battery
5. Electrolyte
solution or paste that conducts a charge

example: stuff in a the middle of the battery
6. Dry Cell
a cell that contains an electrolyte made of a paste

example: Alkaline Batterys
7. Wet Cell
a cell that contains an liquid electrolyte

Example: All motorized vehicales batterys have wet cell batterys to create a spark to start up  cars
8. Primary Cell
cell that can be used only once

Example: Duracell non rechargeable batterys
9. Secondary Cell
a cell that can be recharged

Example: Cell phones,laptops,cameras,i pods
10. Fuel Cell
Cell that generates electricity through the chemical reactions of fuel that is stored outside of the cell.

11. Solar Cell
cell that converts sunlight into electrical energy

Example: Solar Panels
12. Terminal
position on a cell that must connect to other components to from a circuit

Example: a switch in a circuit
13. Switch
device that can complete or break a circuit to which its connected

14. Open Circuit
a circuit that contains a gap or break

Example: Switch is open in a circuit
15. Electric Current
measure of number of charged particles that pass by a point in an electric circuit per second

We measured current in class with a ammeter
16. Coulomb (C)
quantity of charge that is equal to the charge of 6.25 times 10 to the power of 18 electrons.
17. Ampere (A)
the unit of electric current, equivalent to one coulomb per second
18. Electrical Resistence
substance that hinders electric current and converts electrical energy to other forms.
19. Resistor
a device used in and electric circuit to decrease the current through a component by specific amount.
a resistor of any device that converts energy to light,heat,sound,motion.

Example: lamp
21. Potential Difference (voltage)
The difference between the electrical potential energy per unit of charge at two points in a circuit.
22. Volt
unit for potential difference

on joule per coulomb
23. Circuit Diagram
a diagram with simple symbols to represent an electric circuit.

24. Series Circuit
when there is only one path for the elctrons to flow in a circuit.

*Rember by thinking of the time ms.day taught the lesson by having people walk around class acting as electrons.
25. Parallel Circuit
a circuit in which there is more than one path along a circuit.

*Rember by thinking of the time ms.day taught the lesson by having people walk around class acting as electrons.
26. Ohm's Law
the ratio of potential difference to current is a constant called resistence.

Ohm is another scientist.
27. Ohm
the unit of resistance equivalent to one volt per ampere.
28. Superconducter
a material in which electric charge can flow with no resistence.

Example:Mercury is a superconductor
29. Non-ohmic
something that doesnt follow Ohm's Law