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© 2010 Pearson Education, Inc. PowerPoint ® Lectures for College Physics: A Strategic Approach, Second Edition Chapter 23 Circuits.

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Presentation on theme: "© 2010 Pearson Education, Inc. PowerPoint ® Lectures for College Physics: A Strategic Approach, Second Edition Chapter 23 Circuits."— Presentation transcript:

1 © 2010 Pearson Education, Inc. PowerPoint ® Lectures for College Physics: A Strategic Approach, Second Edition Chapter 23 Circuits

2 © 2010 Pearson Education, Inc. Slide Circuits

3 © 2010 Pearson Education, Inc. Slide 23-3

4 © 2010 Pearson Education, Inc. Slide 23-4

5 © 2010 Pearson Education, Inc. Slide 23-5

6 © 2010 Pearson Education, Inc. Drawing Circuit Diagrams Slide 23-12

7 © 2010 Pearson Education, Inc. Checking Understanding The following circuit has a battery, two capacitors and a resistor. Which of the following circuit diagrams is the best representation of the above circuit? Slide 23-13

8 © 2010 Pearson Education, Inc. Answer The following circuit has a battery, two capacitors and a resistor. Which of the following circuit diagrams is the best representation of the above circuit? A Slide 23-14

9 © 2010 Pearson Education, Inc. Kirchhoff’s Junction Law Slide 23-15

10 © 2010 Pearson Education, Inc. Kirchhoff’s Loop Law Slide 23-16

11 © 2010 Pearson Education, Inc. Using Kirchhoff’s Laws Slide 23-17

12 © 2010 Pearson Education, Inc. The diagram below shows a segment of a circuit. What is the current in the 200  resistor? A.0.5 A B.1.0 A C.1.5 A D.2.0 A E.There is not enough information to decide. Checking Understanding Slide 23-18

13 © 2010 Pearson Education, Inc. Answer The diagram below shows a segment of a circuit. What is the current in the 200  resistor? A.0.5 A B.1.0 A C.1.5 A D.2.0 A E.There is not enough information to decide. Slide 23-19

14 © 2010 Pearson Education, Inc. The diagram below shows a circuit with two batteries and three resistors. What is the potential difference across the 200  resistor? A.2.0 V B.3.0 V C.4.5 V D.7.5 V E.There is not enough information to decide. Checking Understanding Slide 23-20

15 © 2010 Pearson Education, Inc. Answer The diagram below shows a circuit with two batteries and three resistors. What is the potential difference across the 200  resistor? A.2.0 V B.3.0 V C.4.5 V D.7.5 V E.There is not enough information to decide. Slide 23-21

16 © 2010 Pearson Education, Inc. Series Resistors Slide 23-22

17 © 2010 Pearson Education, Inc. Parallel Resistors Slide 23-23

18 © 2010 Pearson Education, Inc. 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? Example Problems Slide 23-24

19 © 2010 Pearson Education, Inc. What is the current supplied by the battery in the following circuit? Example Problem Slide 23-25

20 © 2010 Pearson Education, Inc. Find the current in and the potential difference across each of the resistors in the following circuit. Example Problem Slide 23-26

21 © 2010 Pearson Education, Inc. What is the equivalent resistance of the following circuit? Find the current in and the potential difference across each element in the following circuit. Example Problems Slide 23-27

22 © 2010 Pearson Education, Inc. Example Problem As we saw in the previous chapter, a resistor connected to a power supply works as a heater. Suppose an investigator is using a resistor (a length of nichrome wire in an insulating sheath) connected to a battery to warm a solution in the laboratory. It’s a simple circuit: A.What power does the resistor provide to warm the solution? The investigator then decides that this warming is happening too slowly. She has another resistor, but doesn’t have another battery. She needs to connect both resistors and the battery into a single circuit. B.Which of the following circuits will provide more power? Slide 23-28

23 © 2010 Pearson Education, Inc. Analyzing Complex Circuits Slide 23-29

24 © 2010 Pearson Education, Inc. Capacitor Combinations Slide 23-30

25 © 2010 Pearson Education, Inc. Which of the following combinations of capacitors has the highest capacitance? Checking Understanding Slide 23-31

26 © 2010 Pearson Education, Inc. Answer Which of the following combinations of capacitors has the highest capacitance? B Slide 23-32

27 © 2010 Pearson Education, Inc. Which of the following combinations of capacitors has the lowest capacitance? Checking Understanding Slide 23-33

28 © 2010 Pearson Education, Inc. Answer C Which of the following combinations of capacitors has the lowest capacitance? Slide 23-34

29 © 2010 Pearson Education, Inc. RC Circuits Slide 23-35

30 © 2010 Pearson Education, Inc. The following circuits contain capacitors that are charged to 5.0 V. All of the switches are closed at the same time. After 1 second has passed, which capacitor is charged to the highest voltage? Checking Understanding Slide 23-36

31 © 2010 Pearson Education, Inc. Answer The following circuits contain capacitors that are charged to 5.0 V. All of the switches are closed at the same time. After 1 second has passed, which capacitor is charged to the highest voltage? C Slide 23-37

32 © 2010 Pearson Education, Inc. The following circuits contain capacitors that are charged to 5.0 V. All of the switches are closed at the same time. After 1 second has passed, which capacitor is charged to the lowest voltage? Checking Understanding Slide 23-38

33 © 2010 Pearson Education, Inc. Answer B The following circuits contain capacitors that are charged to 5.0 V. All of the switches are closed at the same time. After 1 second has passed, which capacitor is charged to the lowest voltage? Slide 23-39

34 © 2010 Pearson Education, Inc. Electricity in the Nervous System Slide The action potential Depolarization Repolarization Reestablishing resting potential

35 © 2010 Pearson Education, Inc. Saltatory Conduction Slide 23-41

36 © 2010 Pearson Education, Inc. There are some diseases that result in a thinning of the myelin sheath that surrounds peripheral neurons—those that carry signals between the spinal cord and the limbs. How will this thinning affect nerve conduction speed? Explain this using the model for nerve conduction developed in the chapter. Example Problem Slide 23-42

37 © 2010 Pearson Education, Inc. Summary Slide 23-43

38 © 2010 Pearson Education, Inc. Summary Slide 23-44

39 © 2010 Pearson Education, Inc. 1.In the circuit below, the switch is initially open and bulbs A and B are of equal brightness. When the switch is closed, what happens to the brightness of the two bulbs? A.The brightness of the bulbs is not affected. B.Bulb A becomes brighter, bulb B dimmer. C.Bulb B becomes brighter, bulb A dimmer. D.Both bulbs become brighter. Additional Questions Slide 23-45

40 © 2010 Pearson Education, Inc. Answer 1.In the circuit below, the switch is initially open and bulbs A and B are of equal brightness. When the switch is closed, what happens to the brightness of the two bulbs? A.The brightness of the bulbs is not affected. B.Bulb A becomes brighter, bulb B dimmer. C.Bulb B becomes brighter, bulb A dimmer. D.Both bulbs become brighter. Slide 23-46

41 © 2010 Pearson Education, Inc. 2.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? A.The brightness of the bulb is not affected. B.The bulb gets dimmer. C.The bulb gets brighter. D.The bulb initially brightens, then dims. E.The bulb initially dims, then brightens. Additional Questions Slide 23-47

42 © 2010 Pearson Education, Inc. Answer 2.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? A.The brightness of the bulb is not affected. B.The bulb gets dimmer. C.The bulb gets brighter. D.The bulb initially brightens, then dims. E.The bulb initially dims, then brightens. Slide 23-48

43 © 2010 Pearson Education, Inc. Additional Example Problems 1.In the circuit shown below: A.Rank in order, from most to least bright, the brightness of bulbs A–D. Explain. B.Describe what, if anything, happens to the brightness of bulbs A, B, and D if bulb C is removed from its socket. Explain. Slide 23-49

44 © 2010 Pearson Education, Inc. 2.In the circuit shown below, rank in order, from most to least bright, the brightness of bulbs A–E. Explain. Additional Example Problems Slide 23-50

45 © 2010 Pearson Education, Inc. 3.In the circuit shown below: A.How much power is dissipated by the 12 Ω resistor? B.What is the value of the potential at points a, b, c, and d? Additional Example Problems Slide 23-51


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