College Physics 10th Edition by Raymond Serway,Chris Vuille

تمرين 48

What happens when a charged insulator is placed near an uncharged metallic object (a) They repel each other. (b) They attract each other. (c) They may attract or repel each other, depending on whether the charge on the insulator is positive or negative. (d) They exert no electrostatic force on each other. (e) The charged insulator always spontaneously discharges.