737_Physics ProblemsTechnical Physics

# 737_Physics ProblemsTechnical Physics - 26 Capacitance and...

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26 CHAPTER OUTLINE 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 26.6 Electric Dipole in an Electric Field 26.7 An Atomic Description of Dielectrics Capacitance and Dielectrics ANSWERS TO QUESTIONS Q26.1 Nothing happens to the charge if the wires are disconnected. If the wires are connected to each other, charges in the single conductor which now exists move between the wires and the plates until the entire conductor is at a single potential and the capacitor is discharged. Q26.2 336 km. The plate area would need to be 1 0 m 2 . Q26.3 The parallel-connected capacitors store more energy, since they have higher equivalent capacitance. Q26.4 Seventeen combinations: Individual C C C 1 2 3 , , Parallel C C C C C C C C C 1 2 3 1 2 1 3 2 3 + + + + + , , , Series-Parallel 1 1 1 2 1 3 C C C + F H G I K J + , 1 1 1 3 1 2 C C C + F H G I K J + , 1 1 2 3 1 1 C C C + F H G I K J + 1 1 1 2 3 1 C C C + + F H G I K J , 1 1 1 3 2 1 C C C + + F H G I K J , 1 1 2 3 1 1
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