mat-sln-asn-labq-circ - = 2 . 5 and height 1 . 0cm and the...

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Solution for Lab Quiz 13 Resistance Networks Solution to Lab Quiz Problem 13.1(Voltage Across a Device in a Series Circuit Given the Voltage Across the Other Device and the Battery) Problem: Two devices are connected in a series circuit with a 9V battery. The voltage across the frst device is 2V . What is the voltage across the second device? Select One oF the ±ollowing: (a) 2V (b-Answer) 7V (c) 9V (d) 11V (e) Cannot be determined unless the resistances are known. Solution In a series circuit, the total potential drop across the de- vices must be equal to the potential gain across the bat- tery. The potential gain across the battery is the same as the voltage oF the battery: 9V . The given potential drop across the frst device is 2V . The potential drop across the remaining device is then equal to 9V - 2V = 7V . Total Points for Problem: 3 Points 1
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Solution to Lab Quiz Problem 13.2(Multi-Region Parallel Capacitor) Problem: In the stack of conductors and dielectrics at the right, the top dielectric has κ
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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 (e-Answer) 16pF a b Conductor Conductor Conductor 1 2 Solution This capacitor can be viewed as two parallel plate capaci-tors 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 10-12 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 10-12 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.

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mat-sln-asn-labq-circ - = 2 . 5 and height 1 . 0cm and the...

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