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Chapter 23: Q44P (page 682)
Figure 23-52 gives the magnitude of the electric field inside and outside a sphere with a positive charge distributed uniformly throughout its volume. The scale of the vertical axis is set by . What is the charge on the sphere?
The charge on the sphere is .
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A long, non-conducting, solid cylinder of radius 4.0 cmhas a non-uniform volume charge density that is a function of radial distance rfrom the cylinder axis. For, what is the magnitude of the electric field at (a) and (b)?
Assume that a ball of charged particles has a uniformly distributed negative charge density except for a narrow radial tunnel through its center, from the surface on one side to the surface on the opposite side. Also assume that we can position a proton anywhere along the tunnel or outside the ball. Let be the magnitude of the electrostatic force on the proton when it is located at the ball鈥檚 surface, at radius R. As a multiple of R, how far from the surface is there a point where the force magnitude is if we move the proton (a) away from the ball and (b) into the tunnel?
In Fig. 23-48a, an electron is shot directly away from a uniformly charged plastic sheet, at speed . The sheet is non-conducting, flat, and very large. Figure 23-48bgives the electron鈥檚 vertical velocity component vversus time tuntil the return to the launch point. What is the sheet鈥檚 surface charge density?
Figure 23-46a shows three plastic sheets that are large, parallel, and uniformly charged. Figure 23-46b gives the component of the net electric field along an x-axis through the sheets. The scale of the vertical axis is set by. What is the ratio of the charge density on sheet 3 to that on sheet 2?
The square surface shown in Fig. 23-30 measures 3.2mmon each side. It is immersed in a uniform electric field with magnitude E=1800 N/Cand with field lines at an angle of with a normal to the surface, as shown. Take that normal to be directed 鈥渙utward,鈥� as though the surface were one face of a box. Calculate the electric flux through the surface.
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