Answer Happy

A wire is run through a large piece of paper, forming a
perpendicular angle with the paper. A bunch of
magnetically sensitive iron shavings are spread across the
paper and a current is run through the wire. Which of the following
would be the most accurate description of what would
happen?
The filings would shape themselves into a square shape around
the wire, each corner of the square perpendicular to the central
wire
The filings would form parallel lines across the paper, each one
forming a perpendicular angle with the central wire
The filings would shape themselves into a circular shape around
the wire, the direction rotating based on the direction of the flow
of current
The filings would all be attracted magnetically towards the wire
and will all be pulled into a central mass in close proximity to
the wire and will leave the outer part of the sheet of paper
bare