# Science- Unit 2 Electricity chapter 11

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1. Electric circuit
a closed path along which electrons that are powered by an energy source can flow
2. voltaic cell
a source of energy that generates an electric current by chemical reactions involving two different metals or metal compounds separated by a solution that is a conductor
3. battery
a connection of two or more cells
4. Electrode
one of two metal terminals in a cell or battery
5. Electrolyte
a solution or paste that conducts charge
6. Dry cell
a cell that contains an electrolyte that is a paste
7. Fuel cell
a cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
8. Solar cell
a cell that converts sunlight into electrical energy
9. terminal
location on a cell that must be connected to other components to form a circuit
10. Switch
a control device that can complete or break the circuit to which it is connected
11. Open circuit
a circuit that contains a gap or break
12. electric current
the rate of movement of electric charge
13. coulomb (C)
the quantity of charge that is equal to the charge of 6.25 x 1018 electrons
14. ampere (A)
the unit of electric current, equivalent to one coulomb per second
15. electrical resistance
the property of a substance that hinders electric current and converts electrical energy to other forms of energy
16. resistor
a devic used in an electric circuit to decrease the current through a component by a specific amount
17. circuit diagram
a diagram that uses standard symbols to represent the components in an electric circuit and their connections
18. series circuit
a circuit in which there is only one path along which electrons can flow
19. parallel circuit
a circuit in which there is more than one path along which electrons can flow
20. Ohm's law
the ratio of potential difference to current is a constant called resistance
21. ohm
the unit for resistance equivalent to one volt per ampere (V/A)
22. Superconductor
a material through which electric charge can flow with no resistance
23. non-ohmic
not following ohm's law
IT =  I1 +I2+ I3

VT= V1= V2= V3

RT= R1 + R2 +R3