If a bar magnet is cut lengthwise into 3 parts, the total number of poles will be

Options

A. 2
B. 3
C. 4
D. 6

Answer

To solve the problem of how many poles will be present when a bar magnet is cut lengthwise into three parts, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of a Bar Magnet**:
A bar magnet has two poles: a North pole and a South pole.

2. **Cutting the Magnet**:
When we cut the bar magnet lengthwise into three equal parts, we need to consider the properties of magnets. Each piece will still have both a North and a South pole.

3. **Analyzing Each Part**:
- After the first cut, the first piece will have a North pole on one end and a South pole on the other end.
- The same applies to the second piece; it will also have a North pole and a South pole.
- The third piece will similarly have a North pole and a South pole.

4. **Counting the Poles**:
Since each of the three parts has two poles (one North and one South), we can calculate the total number of poles:
\[ \text{Total number of poles} = \text{Number of parts} \times \text{Poles per part} = 3 \times 2 = 6 \]

5. **Conclusion**:
Therefore, when a bar magnet is cut lengthwise into three parts, the total number of poles will be **6**.

### Final Answer:
The total number of poles will be **6**.

---