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Chapter 26: Q. 29 (page 738)
You need a capacitance of , but you don’t happen to have a capacitor. You do have a capacitor. What additional capacitor do you need to produce a total capacitance of ? Should you join the two capacitors in parallel or in series?
The additional capacitance is ofand should be connected parallel.
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Light from the sun allows a solar cell to move electrons from the positive to the negative terminal, doing of work per electron. What is the emf of this solar cell?
Rank in order, from largest to smallest, the potential differences of the four capacitors in Figure Q26.12. Explain.
Two metal electrodes are spaced apart and connected by wires to the terminals of a battery.
a. What are the charge on each electrode and the potential difference between them?
The wires are disconnected, and insulated handles are used to pull the plates apart to a new spacing of .
b. What are the charge on each electrode and the potential difference between them?
A battery with an emf of is connected to the two capacitors shown in FIGURE . Afterward, the charge on capacitor is . What is the capacitance of capacitor ?
A -diameter parallel-plate capacitor with a spacing of is charged to . What are
(a) the total energy stored in the electric field and
(b) the energy density?
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