Read the passage about an investigation.

Question

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.

what is the correct option?

Answer 1

The correct option is A. The student's claim is best supported by the argument that the current in the wire has created a magnetic field with its north pole at the top of the rod.

Answer 2

A student claims that gravitational fields exist between objects that are not in contact with each other. She creates a diagram of two figures. The width of the arrows in Figure A and Figure B represent the strength of the gravitational attraction between two objects.

Image

The student claims the gravitational force is greater between the objects in Figure A. Which argument best supports her claim?
A.
The masses of the objects in Figure A are less than the masses of the objects in Figure B.

B.
The diameters of the objects in Figure A are greater than the diameters of the objects in Figure B.

C.
The distance between the objects in Figure A is shorter than the distance between the objects in Figure B.

D.
The surface area of the larger object in Figure A is greater than the surface area of the larger object in Figure B.

what is the correct option?

Answer 3

The correct option is C. The argument that best supports the student's claim is that the distance between the objects in Figure A is shorter than the distance between the objects in Figure B. In gravitational force, the strength of the attraction decreases as the distance between the objects increases, so a shorter distance would result in a stronger gravitational force.