PHYS208 Fundamentals of Physics II

Answer for Ch. 24, 20E

a) Q' = - Q.

b) same as part a).

c) Q' = - (Q+q).

d) Yes, since E remains zero on surface A regardless of where the sphere is placed inside the shell.

Answer for Ch. 24, 27P

a) radially inward, with


b)  - q on both inner and outer surfaces.

c) same as part a) but radially outward.

Answer for Ch. 24, 53P



c) zero

d) zero

e) inner, - q; outer, 0

Answer for Ch. 25, 77E

a) The two conductors are connected by a third conductor (the wire), thus V1 and V2 must be the same.

b) q1 = 1/3 qq2 = 2/3 q.

c) Ratio of charge densitites is 2.

Last updated March 5, 1998.
Copyright George Watson, Univ. of Delaware, 1997.