Question

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Cassie has a magnet that she holds over an iron nail. The nail moves toward the magnet before the magnet touches it.

Which of the following is true about magnetism?
A.
Magnetism is a force that must directly touch an object in order to move it.
B.
Magnetism is a force that acts at a distance and cannot be seen.
C.
Magnetism is not a force, and therefore it cannot move an object.
D.
Magnetism is a force that can be seen in the air as it moves an object.

Answer 1

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Explanation: "The force which attracts iron nails towards a magnet" is a magnetic force, where the only thing acting on the iron nails is the magnetic field produced by the magnet.

"The force which attracts a positive charge towards a negative charge" and this is an electric force, where the negative charge creates an electric field, and this electric field acts on the positive charge

Both forces are related because both of them are consequences of the electromagnetic field.

Because the things acting on the objects are fields, both of these forces are non-contact forces.

Answer 2

i think it is B. Magnetism is a force that acts at a distance and cannot be seen.