Question 3
A piece of copper is lying on a bench with nothing connected to it. Its free electrons are moving. Is a current flowing?
The right answer is the one marked above.
No, because they move in every direction at once. As many electrons go one way as the other, so nothing is carried anywhere. A current needs a net movement in one direction.
This is what a cell adds. It does not set the electrons going — they were already moving — it gives their movement a direction.