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Published byPeregrine Johnson Modified over 5 years ago

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**Electrical Energy - Moving electrons in a path is electricity**

Electrical Potential Difference (v) is measured in Volts The rate of moving electric charges, Electric Current (I), is measured in Amperes Resistance or opposition to the movement of the energy is called Resistance (R).

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**Circuits – 2 types Series circuits are the most simple.**

One (1) path for the current to travel. Contains an energy source, a path, and a load (something for it to do, like a lamp)

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Circuits – 2 types Parallel circuits provide more than one path for the current to travel. Most circuits are parallel, since if one lamp goes out, the others can stay lit.

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**cause the light bulb to stop glowing?**

Which switches, if opened, will cause the light bulb to stop glowing? Q R H. S J. T It is the only switch in series to both the battery and light.

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**USE THE FORMULA SHEET!! V = I R so, 9V = I x 2 ohms or 4.5 amps**

What is the current in a copper wire that has a resistance of 2 ohms and is connected to a 9 volt electrical source? A amp B amps C amps D amps V = I R so, 9V = I x 2 ohms or 4.5 amps

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