Blocks A and B are identical metal blocks. Initially block A is neutral, and block B has a net charge of 5 nC. Using insulating handles, the blocks are moved so they touch each other. After touching...

Blocks A and B are identical metal blocks. Initially block A is neutral, and block B has a net charge of 5 nC. Using

insulating handles, the blocks are moved so they touch each other. After touching for a few seconds, the blocks are

separated (again using insulating handles).

(a) What is the final charge of block A?

(b) What happened while the blocks were in contact with each other?

(1) Protons moved from block B to block A

(2) Positrons moved from block B to block A

(3) Electrons moved from block B to block A

(4) Both protons and electrons moved.

(5) No charged particles moved.