Chapter 19: Q13CQ (page 694)
Can different equipotential lines cross? Explain.
No, the different equipotential lines cannot cross each other.
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Find the total capacitance of the combination of capacitors in Figure 19.33.
Sketch the equipotential lines surrounding the two conducting plates shown in Figure \({\rm{19}}{\rm{.30}}\), given the top plate is positive and the bottom plate has an equal amount of negative charge. Be certain to indicate the distribution of charge on the plates. Is the field strongest where the plates are closest? Why should it be?
(a) Sketch the electric field lines in the vicinity of the charged insulator in Figure19.31. Note its non-uniform charge distribution.
(b) Sketch equipotential lines surrounding the insulator. Indicate the direction of increasing potential.
The lesser electric ray (Narcine bancroftii) maintains an incredible charge on its head and a charge equal in magnitude but opposite in sign on its tail (Figure19.32).
(a) Sketch the equipotential lines surrounding the ray.
(b) Sketch the equipotential when the ray is near a ship with a conducting surface.
(c) How could this charge distribution be of use to the ray?
Question: Unreasonable Results
(a) On a particular day, it takes\(9.60 \times {10^3}\;J\)of electric energy to start a truck's engine. Calculate the capacitance of a capacitor that could store that amount of energy at\(12.0\;V\).
(b) What is unreasonable about this result?
(c) Which assumptions are responsible?
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