Chapter 14: Q8Q (page 578)
Explain briefly why repulsion is a better test for the sign of a charged object than attraction is.
Repulsion is a better test for the sign of a charged object than attraction is.
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A typical atomic polarizability is . If theq in is equal to the proton charge e, what charge separation s could you produce in a typical atom by applying a large field of , which is large enough to cause a spark in air?
Is the following statement true or false? If true, what principle makes it true? If false, give a counterexample or say why. See Figure 14.67.
“The electric field at the center of an induced dipole, due to the point charge, is equal in magnitude and opposite in direction to the electric field at the location of the point charge, due to the induced dipole.”
Criticize the following statement: "Since an atom's electron cloud is spherical, the effect of the electrons cancels the effect of the nucleus, so a neutral atom can't interact with a charged object." ("Criticize" means to explain why the given statement is inadequate or incorrect, as well as to correct it.)
A student said, “When you touch a charged piece of metal, the metal is no longer charged: all the charge on the metal is neutralized.” As a practical matter, this is nearly correct, but it Isn’t exactly right. What’s wrong with saying that all the charge on the metal is neutralized?
A negatively charged iron block is placed in a region where there is an electric field downward (in the Y − direction) due to charges not shown. Which of the diagrams (a–f) in Figure 14.88 best describes the charge distribution in and/or on the iron block?
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