Magnetic field lines are closer where the magnetic field is

Options

A. strong
B. weak
C. sometimes strong and sometimes weak
D. none of these

Explanation

To answer the question "Magnetic field lines are closer where the magnetic field is," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Magnetic Field Lines**:
- Magnetic field lines are visual representations of the magnetic field around a magnet. They indicate the direction and strength of the magnetic field. The lines emerge from the north pole and enter the south pole of a magnet.

2. **Analyzing the Density of Field Lines**:
- The density of these lines (how close they are to each other) indicates the strength of the magnetic field. The closer the lines are, the stronger the magnetic field in that area.

3. **Identifying Strong and Weak Magnetic Fields**:
- At the poles of a magnet (north and south), the magnetic field lines are very close together, indicating a strong magnetic field. Conversely, in areas away from the poles, the lines are more spread out, indicating a weaker magnetic field.

4. **Conclusion**:
- Therefore, we can conclude that magnetic field lines are closer together where the magnetic field is strong. This leads us to the correct answer: **Strong**.

### Final Answer:
The magnetic field lines are closer where the magnetic field is **strong**.

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