Please explain why this answer is correct. I would expect for them all to be pos
ID: 1278446 • Letter: P
Question
Please explain why this answer is correct. I would expect for them all to be positive (like charges repel).
Three identical conducting spheres on individual insulating stands are initially electrically neutral. The three spheres are arranged so that they are in a line and touching as shown. A negatively-charged conducting rod is brought into contact with sphere A. Subsequently, someone takes sphere C away. Then, someone takes sphere B away. Finally, the rod is taken away. What is the sign of the final charge, if any, of the three spheres?Explanation / Answer
If a charged object is kept in touch with an uncharged object, charge flows from the charged object to the uncharged object until they reach stable equilibrium. Thus, the three spheres acquire some negative charge from negatively charged rod. If the spheres are moved away from one another, they acquire some negative charge. Thus, the correct option is (e).