lecture12 - 1 Capacitance (II) Capacitance (II) Capacitors...

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Unformatted text preview: 1 Capacitance (II) Capacitance (II) Capacitors in circuits Practice: chapter 26, problems 15, 19, 21, 25, 35, 37 Text sections 26.326.5 Quiz Quiz Conducting spheres and a long wire: cm r 10 1 = cm r 30 2 = A total charge +12 C is placed on one sphere. Some of the charge will move to the other sphere until A) the electric fields on the spheres are equal B) the electric potentials on the spheres are equal C) the electric charges on the spheres are equal D) all of the above 2 Capacitors in Circuits Capacitors in Circuits Symbols: or Capacitor b Battery b Switch b + +-- Capacitor Combinations Capacitor Combinations A B Series A B Parallel What is the effective capacitance between A & B? A B Q Q produced voltage d transferre charge = eff C 3 Parallel Parallel C 1 C 2 C 3 A B +Q-Q V Q 1-Q 1 Q 2-Q 2 Q 3-Q 3 Voltages are the same : V 1 = V 2 = V 3 = = V Charges add : Q Q Q Q = + + + ......
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lecture12 - 1 Capacitance (II) Capacitance (II) Capacitors...

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