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Chapter 26: Q. 17 (page 738)
How much work does the charge escalator do to move of charge from the negative terminal to the positive terminal of a battery?
The work done is
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What is the potential difference in Figure EX26.16?
A typical cell has a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outside surface, thus making the cell wall a capacitor. What is the capacitance of a -diameter cell with a -thick cell wall whose dielectric constant is ? Because the cell’s diameter is much larger than the wall thickness, it is reasonable to ignore the curvature of the cell and think of it as a parallel-plate capacitor.
The metal spheres are charged to . Draw this figure on your paper, then draw a plausible contour map of the potential, showing and labeling the equipotential surfaces.
Capacitors and are each charged to , then disconnected from the battery without changing the charge on the capacitor plates. The two capacitors are then connected in parallel, with the positive plate of connected to the negative plate of and vice versa. Afterward, what are the charge on and the potential difference across each capacitor?
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 ?
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