A neutral metal sphere is approached by a negatively charged insulating rod
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Electric Force Field and Potential · Electric Force Field and Potential
Problem
A neutral metal sphere is approached by a negatively charged insulating rod. While the rod is still nearby, the sphere is momentarily connected to Earth and then the ground connection is removed. The rod remains in place throughout this process. After the rod is finally taken far away, what overall charge does the sphere possess?
(a) Negative
(b) Zero
(c) Positive
(d) Indeterminate because it depends on the rod’s magnitude