# electricity 2.2.txt

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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 genreates an electric current
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 made of a paste
7. wet cell
A cell that contains a liquid electrolyte
8. primary cell
A cell that can be used only once
9. Secondary cell
A cell that can be recharged
10. Fuel cell
A cell that generates electricity through the chemical reactions of fuel that is stored outside the cell
11. Solar cell
A cell that converts sunlight into electrical energy
12. Terminal
A position on a cell that must be connected to other components to form a circuit
13. Switch
A control device that can complete or break the circuit to which it is connected
14. Open circuit
• A circuit that contains a gap or break
• Happens if the switch is open
15. Electric current
• The measure of charged particles that pass by a point in an electric circuit each second
• Measured with an ammeter in ampheres (A)
16. Coulomb (C)
the quantity of charge that is equal to the charge of 6.25 x 10^18 electrons
17. Amphere (A)
The unit of electric current, equivalent to one coulomb per second
18. Electrical resistance
The property of a substance that hinders electric current and converts electrical energy to other forms of energy
19. Resistor
A device used in an electric circuit to decrease the current through a component by a specific amount
A resistor or any other device that transforms electrical energy into heat, motion, sound or light
21. Potential Difference (voltage)
the difference between the electric potential energy per unit of charge at two points in a circuit
22. Volt
The unit for potential difference equivalent to one joule (J) per coulomb (C)
23. Circuit diagram
A diagram that uses standard symbols to represent the componenets in an electric circuit and their connections
24. Series circuit
A circuit in which there is only one path along which electrons can flow
25. Parallel circuit
A circuit in which there is more than one path along which electrons can flow
26. Ohm's Law
The ratio of potential difference to current is a constant called resistance
27. Ohm (Ω)
• The unit for resistance equivalent to one volt per amphere
• ( V/A )
28. Superconductor
A material through which electric charge can flow with no resistance
29. Non-ohmic
not following Ohm's law