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Jan31Note - PHYS142 Lecture 11 Capacitance and Dielectrics...

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Capacitance and Dielectrics • Chapter 26 All sections except 6 26.1 Definition of Capacitance 26.2 Calculating Capacitance 26.3 Combinations of Capacitors 26.4 Energy Stored in a Charged Capacitor 26.5 Capacitors with Dielectrics 26.7 An Atomic Description of Dielectrics PHYS142 Lecture 11 1
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V + _ + _ C eq The rule for adding multiple capacitances connected in parallel is: The equivalent circuit is: C eq = C 1 + C 2 + C 3 + ··· 2 Parallel Connection
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The equivalent , total or effective capacitance can be determined from: 2 1 1 1 1 C C C eq The rule for adding multiple capacitances in series is: 3 2 1 1 1 1 1 C C C C eq 3 Series Connection
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C 3 = 5 μF C 1 = 3 μF C 2 = 6 μF V Example 1 : Calculate the total or equivalent capacitance of the circuit below. 4
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μF 21 . 3 4 9 5 9 C 2 1 C C C μF 9 μF 3 μF 6 C 3 = 5 μF C 1 = 3 μF C 2 = 6 μF V 5 1) C 1 and C 2 are parallel Example 1 C C C 1 1 1 3 C 3 = 5 μF V μF 9 C 2) C and C 3 are parallel
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1 2 3 4 5 3% 88% 3% 4% 2% 1. 0.50 C. 2.
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Jan31Note - PHYS142 Lecture 11 Capacitance and Dielectrics...

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