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Circuits containing multiple elements Series and parallel combinations RC circuits

Chapter 23 Circuits. Circuits containing multiple elements Series and parallel combinations RC circuits Electricity in the nervous system. Topics:. Sample question:.

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Circuits containing multiple elements Series and parallel combinations RC circuits

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  1. Chapter 23 Circuits • Circuits containing multiple elements • Series and parallel combinations • RC circuits • Electricity in the nervous system Topics: Sample question: An electric eel can develop a potential difference of over 600 V. How do the cells of the electric eel’s body generate such a large potential difference? Slide 23-1

  2. Example Problem • Compare the brightness of a 40 W bulb and a 25 W bulb • Which would be brighter in parallel? • Which would be brighter in series? • The 25 W bulb • The 40 W bulb • They are equally bright Slide 23-41

  3. There is a current of 1.0 A in the circuit below. What is the resistance of the unknown circuit element? What is the current out of the battery? Slide 23-19

  4. Example Problem In the circuit shown below, rank in order, from most to least bright, the brightness of bulbs A–E. Explain. Slide 23-42

  5. Example Problem • In the circuit shown below: • Rank in order, from most to least bright, the brightness of bulbs A–D. Explain. • Describe what, if anything, happens to the brightness of bulbs A, B, and D if bulb C is removed from its socket. Explain. Slide 23-41

  6. Analyzing Complex Circuits Slide 23-20

  7. What is the equivalent resistance of the following circuit? Find the current in and the potential difference across each element in the following circuit. Slide 23-21

  8. Household Electricity Slide 23-22

  9. The following devices are plugged in to outlets on the same 120 V circuit in a house. This circuit is protected with a 15 A circuit breaker. Device Power Computer 250 W Heater 900 W Lamp 100 W Stereo 120 W Is there too much current in the circuit—does the circuit breaker blow? Slide 23-23

  10. Capacitor Combinations Slide 23-24

  11. Which of the following combinations of capacitors has the highest capacitance? Slide 23-25

  12. Answer Which of the following combinations of capacitors has the highest capacitance? Slide 23-26

  13. RC Circuits  = RC Slide 23-29

  14. Additional Clicker Questions • In the circuit shown below, the switch is initially closed and the bulb glows brightly. When the switch is opened, what happens to the brightness of the bulb? • The brightness of the bulb is not affected. B. The bulb gets dimmer. C. The bulb gets brighter. • The bulb initially brightens, then dims. E. The bulb initially dims, then brightens. Slide 23-39

  15. Answer • In the circuit shown below, the switch is initially closed and the bulb glows brightly. When the switch is opened, what happens to the brightness of the bulb? B. The bulb gets dimmer. Slide 23-40

  16. Additional Examples • In the circuit shown below: • How much power is dissipated by the 12 Ω resistor? • What is the value of the potential at points a, b, c, and d? Slide 23-43

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