AnswersPhysicsMagnets and Magnetism

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Which actions most likely cause the domains in a ferromagnetic material to align? Choose three correct answers.

A
heating the material
B
placing the material in a magnetic field of opposite polarity
C
passing electricity around the material
D
hitting the material
E
rubbing the material against a magnet
F
placing the material near a strong magnet
2
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How does the north pole of a magnet respond to the poles of other magnets?

A
It attracts both north and south poles.
B
It attracts the south pole and repels the north pole.
C
It attracts the north pole and repels the south pole.
D
It repels both north and south poles.
3

Before beginning an experiment, Mrs. Wilson warns her science class not to drop the bar magnets on the floor. What is the most likely reason for Mrs. Wilson’s warning?

A
The magnet might lose its magnetism.
B
The magnet might cause the floor to become magnetic.
C
The magnet might become stuck to the floor.
D
The magnet might make a startling noise.
4

Two bar magnets are labeled A and B. The ends of each magnet are numbered 1 or 2, but the poles are not labeled. When A1 is brought near B1, the bars repel. Which conclusion is best supported by the data?

A
A1 is the north pole of a magnet, and B1 is the south pole of a magnet.
B
A1 and B1 are opposite poles, but there is not enough information to tell which ones.
C
A1 and B1 are like poles, but there is not enough information to tell whether they are north poles or south poles.
D
A1 is the north pole of a magnet, and B1 is the north pole of a magnet.
5

Which actions most likely cause the domains within a material to lose their alignment and become more randomized? Choose three correct answers.

A
placing the material near a strong magnet
B
hitting the material
C
placing the material in a magnetic field of opposite polarity
D
passing electricity around the material
E
heating the material
F
rubbing the material against a magnet
7

An iron nail does not pick up paper clips as a magnet would. What can be concluded about the structure of the iron nail?

A
It has no domains.
B
It has domains that are aligned along the nail’s length.
C
It has domains that are aligned across the nail’s width.
D
It has domains that are not aligned.
8

The north pole of a strong magnet is dragged down an iron nail from the top to the point 50 times. What will most likely happen when the nail is brought near a pile of small paper clips?

A
The nail will not pick up any paper clips because its domains have been aligned.
B
The nail will not pick up any paper clips because its domains are not aligned.
C
The nail will pick up some paper clips because its domains are not aligned.
D
The nail will pick up some paper clips because its domains have been aligned.
9

Steel objects can become temporary magnets because they are mainly composed of which element?

A
iron
B
carbon
C
nickel
D
cobalt

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