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21_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

# 21_Ch 16 College Physics ProblemCH16 Electrical Energy and Capacitance

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Electrical Energy and Capacitance 55 16.38 From ( ) Q C , the initial charge of each capacitor is V = ( ) ( ) 10 10.0 Q F 12.0 V 120 C µ µ = = and ( ) 0 0 x x Q C = = 120 C x Q After the capacitors are connected in parallel, the potential difference across each is , and the total charge of Q Q 3.00 V V = 10 µ = + = is divided between the two capacitors as ( ) ( ) 10 10.0 Q F 3.00 V 30.0 C µ µ = = 10 120 C 30.0 C Q x Q Q and 90.0 C µ µ µ ′ = = = Thus, 90.0 C 30.0 F 3.00 V µ x x Q C V µ = = = 16.39 From ( ) Q C , the initial charge of each capacitor is V = ( )( ) 1 1.00 Q F 10.0 V 10.0 C µ µ = = and ( ) ( ) 2 2.00 F 0 0 µ Q = = After the capacitors are connected in parallel, the potential difference across one is the
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