Free electrons always keep on moving in a conductor. Even then, no magnetic force acts on them in a magnetic field unless a current is passed through it. Why?

Two long, parallel, wires are hanging freely. If they are connected to a battery in series? What would be effect on their position?

Two long, parallel, wires are hanging freely. If they are connected to a battery in parallel, what would be the effect on their positions?

In the given figure, a long, straight current-carrying wire AB is fixed, while the rectangular current-loop is free to move. In which direction would the loop move? Explain with
reason.