Class 023 - ElectricField Applications

# Class 023 - ElectricField Applications - Uniform 4 Excess...

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Electric Field Applications What You Will Learn Today • How are field lines and vectors related? • How do electric fields behave in parallel plate capacitors? Preparation for next class • Read 21.1 – 21.3 • Make progress on Homework: Chapter 20b

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Reading Quiz 1. Which of the following is not true of an electric field A. It points towards a positive charge B. It points towards a negative charge C. It is a vector D. A single charge can have an electric field 2. Electric field lines are ______ where the field is stronger Longer B. Closer together C. Shorter D. Sparse 3. The electric field inside a parallel plate capacitor is Zero Always weak C. Always strong

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Unformatted text preview: Uniform 4. Excess charge in a conductor is: Uniformly distributed On the surface C. Constantly moving Always at rest Electric Field Lines • The electric field at any point is tangent to the curve, in the direction of the arrow • The magnitude is stronger when field lines are closer together Parallel Plate Capacitors • Uniform electric field inside a parallel plate capacitor 2 12 4 1 10 85. 8 Nm C K-× = π ε permittivity constant Forces in Electric Fields • Application: DNA fingerprinting Preparation for Next Class • Read 21.1 – 21.3 • Make progress on Homework: Chapter 20b...
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Class 023 - ElectricField Applications - Uniform 4 Excess...

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