HW2Problems - HW2 : CHAPTER 21, QUESTIONS 6, 14, 15, 17...

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HW2 : CHAPTER 21, QUESTIONS 6, 14, 15, 17 CHAPTER 22, QUESTIONS 11 CHAPTER 21, PROBLEM 11 CHAPTER 22, PROBLEMS 1, 4, 13, 15 QUESTIONS : Q21-6) Contrast the net charge on a conductor to the “free charges”. Q21-14) Explain why we use small test charges when measuring electric fields. Q21-15) When determining an electric field, must we use a positive test charge, or would a negative one do as well? Explain. Q21-17) Assume that the two opposite charges in Fig. 21-33a are 12.0 cm apart. Consider the magnitude of the electric field 2.5 cm from the positive charge. On which side of this charge – top, bottom, left, or right – is the electric field the strongest? The weakest? Q22-11) A point charge Q is surrounded by a spherical surface of radius r0, whose center is at Q. Later, the charge is moved to the right a distance ½ r0, but the sphere remains where it was, Fig. 22-22. How is the electric flux F E through the sphere changed? Is the electric field at the surface of the sphere changed? For each
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