Artificial magnets can be made by

Options

A. chemical methods only
B. mechanical methods only
C. electrical methods only
D. both (b) and (c)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question:**
- The question asks about the methods used to create artificial magnets.

2. **Identifying the Methods:**
- There are primarily two methods to create artificial magnets: mechanical methods and electrical methods.

3. **Mechanical Methods:**
- **Single Touch Method:**
- In this method, an iron bar is magnetized by rubbing one end of a bar magnet (e.g., a north pole) against it repeatedly. This process aligns the magnetic domains in the iron bar, turning it into a magnet.
- **Double Touch Method:**
- This method involves using two magnets instead of one. The process is similar to the single touch method, but it enhances the magnetization effect.

4. **Electrical Methods:**
- **Electromagnets:**
- An electromagnet is created by wrapping a wire around an iron core and passing an electric current through the wire. When the current flows, the iron core becomes magnetized. This magnetism is temporary and ceases when the current is turned off.

5. **Conclusion:**
- Artificial magnets can be made using both mechanical methods (single touch and double touch) and electrical methods (like electromagnets). Therefore, the correct answer to the question is that artificial magnets can be made by both mechanical and electrical methods.

**Final Answer:**
Artificial magnets can be made by mechanical methods (single touch and double touch) and electrical methods (electromagnets).

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