Multiple Choice Question

Question

Read the passage about an investigation.

A student is performing an investigation in which she wraps a current-carrying wire around an iron rod. She places the north pole of a bar magnet near the top of the rod. The magnet moves away from the rod. The student claims that a field exists between the rod and the magnet.

Which argument best supports her claim?

A.
The current in the wire has created a magnetic field with its north pole at the top of the rod.

B.
The current in the wire has created a magnetic field with its south pole at the top of the rod.

C.
The current in the wire has created a gravitational field with its north pole at the top of the rod.

D.
The current in the wire has created a gravitational field with its south pole at the top of the rod.

Answer 1

The argument that best supports the student's claim is:

A. The current in the wire has created a magnetic field with its north pole at the top of the rod.

This choice supports the idea that the wire produces a magnetic field, which can interact with the magnetic field of the bar magnet. If the north pole of the magnet is repelled from the top of the rod, it suggests that there is indeed a magnetic field present in that region, supporting the student's claim that a field exists between the rod and the magnet.