Chapter 26: Q. 11 (page 738)
Figure EX26.11 is a graph of. Draw the corresponding graph of.
Short Answer
We've drawn the required graph with
Chapter 26: Q. 11 (page 738)
Figure EX26.11 is a graph of. Draw the corresponding graph of.
We've drawn the required graph with
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Get started for freeConsider a uniformly charged sphere of radius R and total cAlC charge Q. The electric field outside the sphere is simply that of a point charge Q. In Chapter 24, we used Gauss's law to find that the electric field inside the sphere is radially outward with field strength
a. The electric potential outside the sphere is that of a point charge Q. Find an expression for the electric potentialat position r inside the sphere. As a reference, let at the surface of the sphere.
b. What is the ratio
c. Graph V versus r for 0 r 3 R.
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?
A typical cell has a membrane potential of , meaning that the potential inside the cell is less than the potential outside due to a layer of negative charge on the inner surface of the cell wall and a layer of positive charge on the outer surface. This effectively makes the cell wall a charged capacitor. Because a 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. How much energy is stored in the electric field of a diameter cell with a thick cell wall whose dielectric constant is ?
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?
In Problems 75 through 77, you are given the equation(s) used to solve a problem. For each of these, you are to: a. Write a realistic problem for which this is the correct equation (s). b. Finish the solution to the problem.
whereas a is a constant with units of.
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