Learning objective
D.2.1—Electric charge forces
• Direction of forces between the two types of electric charge.
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Course review
D.2 Electric and magnetic fields
Review each learning objective in this topic, then open its concept explanation or question set.
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Learning objective
D.2.2—Coulomb’s law
• Coulomb’s law: F=kq1q2/r^2 for point charges; k=1/(4πε0).
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Learning objective
D.2.3—Charge conservation
• Conservation of electric charge.
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Learning objective
D.2.4—Millikan experiment
• Millikan’s experiment as evidence for quantization of electric charge.
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Learning objective
D.2.5—Charge transfer
• Charge transfers by friction, electrostatic induction or contact. • Grounding can remove or add charge.
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Learning objective
D.2.6—Electric field strength
• Electric field strength: E=F/q.
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Learning objective
D.2.7—Electric field lines
• Electric field lines.
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Learning objective
D.2.8—Field-line density
• Relationship between field line density and field strength. • Greater field-line density indicates stronger field.
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Learning objective
D.2.9—Parallel-plate field
• Uniform field between plates: E=V/d.
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Learning objective
D.2.10—Magnetic field lines
• Magnetic field lines.
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