CHAPTER 21, QUESTIONS 6, 14, 15, 17
CHAPTER 22, QUESTIONS
CHAPTER 21, PROBLEM
CHAPTER 22, PROBLEMS 1, 4, 13, 15
Q21-6) Contrast the
on a conductor to the “free charges”.
Q21-14) Explain why we use
test charges when measuring electric fields.
Q21-15) When determining an electric field, must we use a
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
sphere changed? Is the electric field at the surface of the sphere changed? For each