lecture_06_F2011

lecture_06_F2011 - Page 4 Practical Capacitors Dielectric...

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Lecture 6 Chapters 22 and 23 Page 1 Chapter 23 Begin with a problem: Text Problem 23 – 20 An uncharged capacitor has parallel plates 5.0 cm on a side, spaced 1.2 mm apart. a . How much work is required to transfer 7.2 μ C from one plate to the other? b . How much work is required to transfer a second 7.2 C ?
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Lecture 6 Chapters 22 and 23 Page 2
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Lecture 6 Chapters 22 and 23 Page 3 Parallel-plate capacitor with dielectric filler 
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Lecture 6 Chapters 22 and 23
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Unformatted text preview: Page 4 Practical Capacitors Dielectric Material Dielectric constant Breakdown Field (MV/m) Air 1 3 Al 8.4 670 Glass (Pyrex) 5.6 14 • • • • • • • • • Water 80 Conditional Problem: A 200-μ F capacitor has a working voltage of 40 V , while a 5.0-F capacitor is rated at 300 V . a . Which can store more charge? b. Which can store more energy? Lecture 6 Chapters 22 and 23 Page 5 Equivalent Capacitance: C eq...
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lecture_06_F2011 - Page 4 Practical Capacitors Dielectric...

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