4
Every current through a wire produced a magnetic field. And since the magnetic field of Earth is weak, it will get attracted towards the wire.
We don't know the change in velocity, so can't answer.
No it won't. It'll vary inversely as the square of the separation.
There are NO true statements on that list of choices.
Average speed =
(distance covered during some period of time)
divided by
(length of time to cover that distance).
