Read the passage about an investigation and answer the following question:

Question

Camila 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. Camila claims that a field exists between the rod and the magnet.


Which argument best supports Camila’s claim?

options:

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

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

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

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

Answer 1

The best argument that supports Camila's claim is:

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

This is because the presence of a magnetic field between the wire (which is carrying current and creating its own magnetic field) and the bar magnet (which has a north pole) would explain why the magnet moves away from the rod. If the wire creates a magnetic field with a north pole at the top of the rod, it would repel the north pole of the magnet, causing it to move away.