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Chapter 26: Q. 24 (page 738)
A switch that connects a battery to a 10 mF capacitor is closed. Several seconds later you find that the capacitor plates are charged to 30 mC. What is the emf of the battery?
The emf of battery is.
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Figure EX26.3 is a graph of . What is the potential difference between and ?
Figure Q26.7 shows an electric field diagram. Dashed lines 1 and 2 are two surfaces in space, not physical objects.
a. Is the electric potential at point a higher than, lower than, or equal to the electric potential at point b? Explain.
b. Rank in order, from largest to smallest, the magnitudes of the potential differences .
c. Is surface 1 an equipotential surface? What about surface 2? Explain why or why not.
Engineers discover that the electric potential between two electrodes can be modeled as , where is a constant, is the distance from the first electrode in the direction of the second, and is the distance between the electrodes. What is the electric field strength midway between the electrodes?
What are the charge on and the potential difference across each capacitor in FIGURE ?
The potential at the center of a 4.0-cm-diameter copper sphere is 500 V, relative to V = 0 V at infinity. How much excess charge is on the sphere?
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