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DAY 25 Electric Fields. What is an Electric Field? Who cares? Slide 20-34.

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Presentation on theme: "DAY 25 Electric Fields. What is an Electric Field? Who cares? Slide 20-34."— Presentation transcript:

1 DAY 25 Electric Fields

2 What is an Electric Field? Who cares? Slide 20-34

3 What is an Electric Field? Who cares? Slide 20-34

4 Constructing the Electric Field Slide 20-34

5 Constructing the Electric Field Slide 20-34

6 Constructing the Electric Field Slide 20-34

7 The Electric Field of a Point Charge Slide 20-35

8 The Electric Field model Slide 20-34

9 Superposition of Electric fields Slide 20-34

10 Determine the magnitude and the direction of the electric field at point A. Example Problem Slide 20-70

11 Dipole Electric Fields Slide Field lines

12 Electric Field Lines Slide 20-50

13 Uniform Electric Fields Slide 20-45

14 Cathode ray tube Slide 20-55

15 Examples Slide a.The CRT (cathode ray tube) needs the electrons to exit with speed 6E7 m/s. What electric field strength is necessary? b. A uniform electric field of 1.5E5 N/C is used to deflect the beam. What angle?

16 Conductors and Electric Fields Slide 20-55

17 Conductors and Electric Fields Slide A positively charged (non-metallic) sphere is places over a metal plate with a net negative charge.

18 Conductors and Electric Fields Slide A positively charged (non-metallic) sphere is places over a metal plate with a net negative charge.

19 Forces and Torques on Charges in Electric Fields Slide 20-56


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