Question

1. which of the following materials will not form a natural magnet?

iron

nickel

cobalt

platinum

Explanation:

Identify the question objective

The question asks to identify which of the listed materials (Iron, Nickel, Cobalt, Platinum) will not form a natural magnet.

Analyze the properties of the materials

Using the Magnetic Materials knowledge point

• Iron, Nickel, and Cobalt are ferromagnetic materials. They have high magnetic susceptibility and can retain magnetization to form permanent (natural) magnets.
• Platinum is a paramagnetic material. It is only weakly attracted by a magnetic field and cannot retain permanent magnetization to form a natural magnet.

Determine the correct option

Since Platinum is paramagnetic and cannot form a permanent magnet, it is the material that will not form a natural magnet.

Answer:

• Iron
• Nickel
• Cobalt
• Platinum (Correct answer)