73. Which of the following concepts of magnetism is best illustrated by the diagram, which shows a steel nail in contact with both a magnet and a paper clip?
Answer: D
Magnetic force can induce magnetism in particular materials.
The diagram illustrates how a steel nail can become magnetized when it comes into contact with a magnet and a paper clip. This phenomenon demonstrates the concept of magnetic induction, where the magnetic field of the magnet induces magnetism in the steel nail.
A) Magnetic force causes the nail to act as an electromagnet.
This option is incorrect because the steel nail is not functioning as an electromagnet; instead, it is becoming temporarily magnetized due to the influence of the external magnetic field from the magnet. Electromagnets require an electric current to generate a magnetic field, which is not indicated in the diagram.
B) Magnets have a magnetic north pole and a magnetic south pole.
While true, this option does not directly address the concept illustrated by the diagram. The presence of magnetic poles is a fundamental property of magnets but does not explain the interaction between the magnet, the nail, and the paper clip in the context of magnetism induction.
C) Magnets can either attract or repel each other.
This statement is accurate regarding the behavior of magnets, but it does not pertain to the situation depicted in the diagram. The focus here is on the process of magnetization rather than the attraction or repulsion between two magnets.
D) Magnetic force can induce magnetism in particular materials.
This option is correct as it directly relates to the illustration provided. The diagram shows that the magnetic field of the magnet induces magnetism in the steel nail, making it a clear example of magnetic induction in action.
Conclusion
The correct answer, D, highlights the principle that magnetic force can induce magnetism in certain materials, as demonstrated by the steel nail in contact with a magnet. Other options fail to capture this specific interaction, either addressing unrelated properties of magnets or misrepresenting the nature of the phenomena depicted. Thus, D is the definitive choice in explaining the concept illustrated by the diagram.