Question

An electrically charged metal object with charge q is placed within a closed conducting can that is sitting on an insulator.

The charged metal object inside the metal can is now touched to the surrounding can. The can remains insulated. Check all the answers that are correct.

The fraction of charge that appears on the outside of the can depends on the ratio of the maximum curvatures of the two objects.When the metal object is withdrawn, it takes all its original charge q with it, leaving the can uncharged again.When the metal object is withdrawn, it takes only half its original charge q with it, leaving the can with charge q/2.The fraction of charge that appears on the outside of the can depends on the ratio of the masses of the two objects.Half the charge appears on the outside of the can.All the charge appears on the outside of the can.The fraction of charge that appears on the outside of the can depends on the ratio of the areas of the two objects.

Answer 1

The charged metal object inside the metal can is now touched to the surrounding can. The can remains insulated. Check all the answers that are correct.

               

• The fraction of charge that appears on the outside of the can depends on the ratio of the maximum curvatures of the two objects : Wrong
• When the metal object is withdrawn, it takes all its original charge q with it, leaving the can uncharged again.: Wrong

When the metal object is withdrawn, it takes only half its original charge q with it, leaving the can with charge q/2:: rightThe fraction of charge that appears on the outside of the can depends on the ratio of the masses of the two objects: wrongHalf the charge appears on the outside of the can. WrongAll the charge appears on the outside of the can. RightThe fraction of charge that appears on the outside of the can depends on the ratio of the areas of the two objects.: Right