# Electricity Chapter11 Glossary Terms - SNC1DW (Sem1)

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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 the 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 electolyte that is a paste
7. Wet cell
A cell that contains a liquid electrolyte
8. Primary cell
A cell that can only be used 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
Location on a cell that must be connected to other components to form a circuit
13. Switch
A control device that can complete or break to which it is connected
14. Open circuit
A circuit that contains a gap or break
15. Electric current
The rate of movement of electric charge
16. Coulomb (C)
• The amount of charge that is equal to the charge of 6.25x1018 electrons
• (Large amount of electrons because of small size)
17. Ampere (A)
• The unit of electric current
• Equivalent to to one coulomb of charge 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, soun, or light
21. Potential differene (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
• Equal to 1 joule(J) per coulomb(C)
23. Circuit diagram
A diagram that uses standard symbols to represent components in an electric circuit and their connections
24. Series circuit
A circuit with only one path
25. Parallel circuit
A circuit with more than one path
26. Ohm's law
• The ratio of potential difference to current is a constant called resistance
• V=IR
27. Ohm (Ω)
• The unit for resistance
• Equal to 1 V per A
28. Superconductor
• A material through which electrons can flow through with no resistance
• Mercury becomes superconductor at temp. of liquid helium
29. Non-ohmic
• Not following Ohm's law
• The filament of an incandescent bulb is     non-ohmic