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CH 17 terms1

QuestionAnswer
1. Law of electric charge like charges repel and opposites attract.
2. Electric Force The force between two objects.
3. Electric field The region around a charged particle.
4. 3 ways to “Charge It” Friction, Conduction, Induction
5. Conservation of Charge When you charge objects no charges are created or destroyed.
6. How can a charge be detected? Using an electroscope.
7. Conductors a material in which charges can move easily.
8. Examples of conductors Copper, silver, aluminum and mercury.
9. Insulators A material in which charges cannot move easily.
10. Examples of insulators Plastic, rubber, glass, wood and air.
11. Static Electricity The build up of electric charges on an object.
12. Electrical discharge The loss of static electricity as charges move off an object.
13. Lightning A dramatic form of electrical discharge.
14. Lightning Rods A pointed rod connected to the ground by a wire.
15. Grounded Objects that come in contact with the earth.
16. Dangerous places when it is lightning include anything that sticks out in an open area.
21. Cell a device that produces an electric current by converting chemical energy into electric energy.
22. Battery Does the same thing as cells and contains cells.
23. Parts of a battery electrolyte & electrode
24. Types of Battery Cells Dry cells and Wet cells.
25. What is the relationship between potential difference & volts Potential difference in expressed in volts.
26. Photocells & examples Converts light into electric energy. Solar panel.
27. Electrical current The rate at which charge passes a certain point.
28. Two types of electrical current Alternating current (AC) Direct current (DC)
29. Direct Current Charge always flows in the same direction.
30. Alternating Current Charge that continually changes direction.
31. Voltage The difference in energy per unit charge as a charge moves between two points in the path of a current.
32. Resistance The opposition of the flow of electric charge.
33. What is the relationship between resistance & current Resistance opposes the movement of a current. Just like friction.
34. How thickness, length & temperature effect electrical current Thickness- A thick pipe has less resistance than a thin pipe. Temperature- Higher the temperature the higher the resistance. Length- The longer it is the more resistance there is.
35. What is Ohm’s Law? A formula that shows that current, voltage, and resistance are related.
36. Electrical Power Formula power equals voltage X current.
37. Watt The unit for power.
38. How is household energy measured by the energy company Killowatts.
Circuit A complete closed path that electrical charges flow through.
Load A device that uses electrical energy to do work.
What do all loads do? offer some resistance to electric currents and cause the electrical energy to change into another form of energy such as light energy or mechanical energy.
Explain the role of a switch in closing or opening a circuit. The switch is used to open or close the circuit. To complete the circuit the switch is flipped and the circuit is closed. To turn off the power you flip the switch and it opens the circuit causing the circuit to not be complete.
Series Circuit A circuit in which all parts are connected in a single loop.
How many paths are in a series circuit? One.
Explain what happens if one load in the series circuit is malfunctioning If one load in the cicuit is unfunctioning then loads after it will not function either.
Parallel Circuit A cicuit in which different loads are located on seperate branches.
Why is this circuit important in the wiring of the lights in a building? Because you could still use other appliances if a load goes out if it is a parallel circuit.
Explain what happens if one load in the parallel circuit is malfunctioning The other loads still work.
Give an example of a parallel circuit in your house electrical outlets.
Using the last paragraph p. 444 and fig. 26, explain the causes and dangers of overloading a circuit pluggiong to many loads into an outlet; fire.
Explain how a fuse and circuit breakers help with circuit safety in your house and automobile They protect things from overloading and causing a fire.
Created by: JoshDrexler
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