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Unformatted text preview: = 2 . 5 and height 1 . 0cm and the bottom dielectric has = 3 . 5 and height . 50cm . The plate area of all conductors and dielectrics is 1 . 10 2 cm 2 . What is the capacitance of the stack? Select One of the Following: (a) 120pF (b) 98pF (c) 56pF (d) 27pF (eAnswer) 16pF a b Conductor Conductor Conductor 1 2 Solution This capacitor can be viewed as two parallel plate capacitors in series. The rst capacitor, C 1 , formed from the top conductor, the 1 dielectric, and the center conductor has 2 capacitance C 1 = A d 1 1 = (8 . 85 1012 C 2 Nm 2 )(100cm 2 ) 1 cm (2 . 5) = 22 . 1pF The center conductor, 2 dielectric, and the bottom plate has capacitance C 2 = A d 2 2 = (8 . 85 1012 C 2 Nm 2 )(100cm 2 ) . 5cm (3 . 5) = 62 . 0pF . Now add the conductor in series, 1 C ab = 1 C 1 + 1 C 2 = 1 22 . 1pF + 1 62 . 0pF Solving C ab = 16 . 3pF Total Points for Problem: 3 Points 3...
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This note was uploaded on 03/29/2010 for the course PHYS 2469 taught by Professor Stewat during the Spring '10 term at University of Arkansas Community College at Batesville.
 Spring '10
 Stewat
 Resistance, Work

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