Loose Leaf For Engineering Electromagnetics
Loose Leaf For Engineering Electromagnetics
9th Edition
ISBN: 9781260472370
Author: John A. Buck, William H. Hayt
Publisher: McGraw-Hill Education
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Chapter 6, Problem 6.3P

Capacitors tend to be more expensive as their capacitance and maximum voltage V max increase. The voltage V max is limited by the field strength at which the dielectric breaks down, Ebd- Which of these dielectrics will give the largest CVmax product for equal plate areas? (a) Air: đ�œ–y = 1, Ebd = 3 MV/m. (b) Barium titanate: e? = 1200, EBD = 3 MV/m. (c) Silicon dioxide: đ�œ–r = 3.78, EBD = 16 MV/m. (d) Polyethylene: đ�œ–T = 2.26, EBD = 4.7 MV/m.

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A parallel-plate capacitor using a dielectric material having an Pr of 2.2 has a plate spacing of 2 mm (0.08 in.). If another material having a dielectric constant of 3.7 is used and the capacitance is to be unchanged, what must the new spacing be between the plates?
A parallel plate capacitor has an area of 7.45 × 10−4?2and its plates are separated by a distance of 2.45 ?? across which a potential of 20 ? is applied. If a material with dielectric constant 6 is introduced between the plates, determine the capacitance, the charge stored on each plate, the dielectric displacement and the polarization.
Find the relative permittivity of the dielectric material present in a parallel-platecapacitor if: (a) S = 0.12 m/, d = 80 μm, V = 12 volt, and the capacitor contains1 ?? of energy; (b)The stored energy density is 100 ?/?/, V = 200 volt, and ? =45 ??; (c) ? = 200 ??/? and ?# = 20 ??/?/.

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Loose Leaf For Engineering Electromagnetics

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Demos: Dielectric breakdown; Author: Caltech's Feynman Lecture Hall;https://www.youtube.com/watch?v=2YrHh1ikefI;License: Standard Youtube License