Download Mapping out the Electrical Field

Chapter 17 Lecture
Chapter 17:
Electric Charge
and Electric Field
© 2016 Pearson Education, Inc.
Goals for Chapter 17
• To study electric charge, conductors, and
insulators.
• To understand Coulomb's law and solve some
example problems.
• To understand electric fields.
• To calculate electrical forces.
• To map out electric field lines.
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Electrical Charges are All Around Us
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Exploring the Nature of Electrical Charge −
Figure 17.1
• Plastic, silk, rubber, glass and fur can reveal
fundamental behaviors of charge.
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Atomic Charge Arrangements – Figures 17.2
and 17.3
• Protons (+) and electrons
(−) account for atomic
charges.
• Electrons move; protons
don't.
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Charge Movement by Conduction –
Figure 17.4
• Direct contact
• Charge moves
through a conductor.
• Metals are good
conductors.
• Non-metals are most
often not.
• Discuss insulators.
• Discuss
semiconductors.
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Charging by Induction – Figure 17.5
• If attracted or repelled, the electrons inside an
object may be polarized.
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Static Affects Even Uncharged Objects –
Figure 17.6
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Polarization (the Paper and the Comb) –
Figure 17.8
• Induced charges are
present in the
everyday examples.
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Polarization Determines Induced Charge –
Figure 17.7
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How Coulomb Measured the Force –
Figure 17.9
• Read through the text
on pages 531 to 537.
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Electrical Force – Examples 17.1 and 17.2
• Refer to Problem Solving Strategy on page 534 then try
Examples 17.1 and 17.2.
• The problems build complexity in layers, so be sure to do
these two!
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Forces are Additive – Example 17.3
• Refer to Example 17.3 on page 536 and
Figure 17.11.
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Forces are Additive Even if Non-Linear –
Example 17.3
• Refer to the Example 17.4 on page 537 and
Figure 17.13.
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Mapping out the Electrical Field –
Figures 17.15 and 17.16
• Moving the test charge can allow forces to be measured.
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Force Causes Acceleration – Example 17.5
• Refer to Example 17.5 on page 539 and Figure
17.17.
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Calculating the Electric Field – Example 17.6
• Refer to Example 17.6 on page 541 and Figure
17.19.
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The Field Around a Dipole – Example 17.7
• Refer to Example 17.7 on pages 542−543 and Figures 17.20
and 17.21.
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The Electric Field is Mapped – Figures 17.23
and 17.24
• Refer to the characteristics at the bottom of page
543.
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The Field Formed Related to the Electrode –
Figure 17.25
• Refer to the text in the middle of page 544.
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