Which of the following is the most suitable material for making permanent magnet ?

Options

A. Copper
B. Nickel
C. Soft iron
D. Steel

Answer

To determine the most suitable material for making a permanent magnet from the given options (copper, nickel, soft iron, and steel), we can follow these steps:

### Step 1: Understand the properties of materials
Permanent magnets are typically made from materials that exhibit strong ferromagnetic properties. Ferromagnetic materials can be magnetized and retain their magnetism even after the external magnetic field is removed.

### Step 2: Analyze the options
- **Copper**: This is a non-ferromagnetic material and does not retain magnetism.
- **Nickel**: This is a ferromagnetic material but is not as effective as steel for making permanent magnets.
- **Soft Iron**: This is also a ferromagnetic material, but it is typically used for temporary magnets because it loses its magnetism quickly once the external magnetic field is removed.
- **Steel**: This is a ferromagnetic material that can retain its magnetism for a long time, making it suitable for permanent magnets.

### Step 3: Identify the best option
Among the four options, steel is the most suitable material for making permanent magnets due to its strong ferromagnetic properties and ability to retain magnetism.

### Final Answer:
The most suitable material for making a permanent magnet is **steel**.

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