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Understanding Electricity: Potential Difference and Circuit Fundamentals

In this chapter, we explore the concept of potential difference, also known as voltage, and its critical role in the flow of electricity. By examining the net charges of two objects, we can determine whether electricity will flow easily between them. Key terms such as current, which describes the movement of electric charge, and the implications of potential difference in circuits are discussed. We also cover various circuit types, including series and parallel circuits, and introduce important formulas for calculating resistance, power, and current, for practical applications.

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Understanding Electricity: Potential Difference and Circuit Fundamentals

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  1. Chapter 22-23 notes Electricity and circuits

  2. Potential Difference • Look at your two objects, determine their net charges, and figure out what the potential difference between them is. The greater the potential difference, the quicker/easier electricity will flow.

  3. What is the potential difference? • Think of a number line; how far apart are these two? • Will electricity flow? Easily?

  4. What is the potential difference ? • Will electricity flow? Easily?

  5. What is the potential difference? • Will electricity flow? Why or why not?

  6. Terms • Current – like a river, if the water is moving, there is a current. If electricity can move (because there isa potential difference), there is a current. • Potential difference – also called voltage – describes how easily electricity will flow. The greater the difference, the easier it is for electricity to flow.

  7. Superconductors? Currently not practical because they must be supercooled to work!

  8. More superconductors

  9. Circuit symbols

  10. Types of circuits: series

  11. Series continued…

  12. Parallel circuits

  13. Parallel continued…

  14. Formulas: R = V P = energy I time P = IV P = I2R (everywhere you see I, that means …)

  15. Classwork Page 527 # 21-28,30 and 34 # 34 has mA (milli amperes) which we have to convert to amperes by multiplying by 1 X 10-3 Quiz tomorrow

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