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Current Electricity

Current Electricity. By: Brianna Shields April 29, 2005. DO NOW. 1. Which subatomic particle is most easily removed from the atom? 2. Name two particles that would repel when brought close together. 3. If an object is missing electrons, what is the charge on it?. GOAL.

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Current Electricity

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  1. Current Electricity By: Brianna Shields April 29, 2005

  2. DO NOW • 1. Which subatomic particle is most easily removed from the atom? • 2. Name two particles that would repel when brought close together. • 3. If an object is missing electrons, what is the charge on it?

  3. GOAL TO IDENTIFY THE PARTS OF A CIRCUIT TO DISTINGUISH BETWEEN STATIC AND CURRENT ELECTRICITY

  4. Grounding Electricity Video Questions • What happens if an object has a charge- does it stay like that forever (how do you get rid of it)?

  5. Grounding Touching an object to the ground to get rid of the charge Electrons balance out Grounding Electricity

  6. Electricity Explain what occurs when you build up a negative charge and touch a conductor. Could this light a lightbulb?

  7. Electricity Video Questions • WHAT ARE THE PARTS OF A CIRCUIT?? • WHAT DOES A SWITCH ACTUALLY DO?

  8. Circuits Allow electrons to move continuously Source Load/resistance Wires Switch Current Electricity

  9. Circuits 1. Source: getting the electrons moving Battery or generator Electrons flow negative to positive end Current Electricity

  10. Circuits 2. Wires- hook to ends of battery to make a circuit Continuous electron path Current= how many electrons passing through Current Electricity

  11. Circuits 3. Load- resist some electrons from flowing Converts e’s to heat and light Ex: lightbulb, toaster Current Electricity

  12. Circuits 4. Switch- opens and closes circuit pathway Electrons cannot flow through open path Current Electricity

  13. Electricity Vocab Voltage- amount of work required to move charges Current Electricity

  14. Electricity Vocab Resistance- how much the wire resists electron flow Higher resistance = less current flow Good conductors=low resistance (copper) Current Electricity

  15. Types of circuits Series- all parts of circuit are connected in one loop or path Problem: breaking a series circuit stops electron flow Current Electricity

  16. Types of circuits Parallel- different parts of the circuit are on different branches (many paths) Good: a break in the circuit, still can allow electron flow Current Electricity

  17. Describe this circuit diagram using scientific terms How many loads, sources, wires and switches. Is it series or parallel?

  18. Describe this circuit diagram using scientific terms How many loads, sources, wires and switches. Is it series or parallel?

  19. Describe this circuit diagram using scientific terms How many loads, sources, wires and switches. Is it series or parallel?

  20. Describe this circuit diagram using scientific terms How many loads, sources, wires and switches. Is it series or parallel?

  21. Describe this circuit diagram using scientific terms How many loads, sources, wires and switches. Is it series or parallel?

  22. Assessment • Draw a circuit in series with one source, one switch and four loads • Draw a circuit in parallel with two loops/branches, one source, one switch and two loads on each branch

  23. Assessment • Draw a circuit in series with one source, two switches and two loads • Draw a circuit in parallel with four loops/branches, one source, one switch and three loads on each branch

  24. House circuits Parallel- if part of the circuit is damaged, electrons can still go through other branches Fuses- melts to break circuit when current is too high Circuit breaker- switches off to break circuit when current is too high Which is most likely better to use? Current Electricity

  25. Fuses and Circuit Breakers

  26. Electricity Websites • Static Electricity Site

  27. Electricity Activity • Work with your partner on the electricity worksheet • We will go over it when you are complete

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