Chapter 4: Q1DQ (page 744)
A rubber balloon has a single point charge in its interior. Does the electric flux through the balloon depend on whether or not it is fully inflated? Explain your reasoning.
No, the electric flux does not depend on whether the balloon is fully inflated or not.
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A particle with chargeis moving in a uniform magnetic fieldrole="math" localid="1655717557369"
The magnetic force on the particle is measured to berole="math" localid="1655717706597" (a) Calculate all the components of the velocity of the particle that you can from this information. (b) Are there
components of the velocity that are not determined by the measurement of the force? Explain. (c) Calculate the scalar product. What is the angle between velocity and force?
Small aircraft often have 24 V electrical systems rather than the 12 V systems in automobiles, even though the electrical power requirements are roughly the same in both applications. The explanation given by aircraft designers is that a 24 V system weighs less than a 12 V system because thinner wires can be used. Explain why this is so.
Question: A conducting sphere is placed between two charged parallel plates such as those shown in Figure. Does the electric field inside the sphere depend on precisely where between the plates the sphere is placed? What about the electric potential inside the sphere? Do the answers to these questions depend on whether or not there is a net charge on the sphere? Explain your reasoning.
The definition of resistivity implies that an electrical field exist inside a conductor. Yet we saw that in chapter 21 there can be no electrostatic electric field inside a conductor. Is there can be contradiction here? Explain.
Each of the lettered points at the corners of the cube in Fig. Q27.12 represents a positive charge moving with a velocity of magnitude in the direction indicated. The region in the figure is in a uniform magnetic field , parallel to the x-axis and directed toward the right. Which charges experience a force due to ? What is the direction of the force on each charge?
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