Which of the following figures represents the magnetic lines of force due to an isolated south pole ?

Options

A.
B.
C.
D.

Answer

To determine which figure represents the magnetic lines of force due to an isolated south pole, we need to understand the behavior of magnetic field lines around a magnetic pole.

### Step-by-Step Solution:

1. **Understanding Magnetic Poles**:
- A magnetic field has two poles: north and south. The magnetic lines of force emerge from the north pole and enter the south pole.

2. **Behavior of Magnetic Lines of Force**:
- For an isolated south pole, all the magnetic lines of force will enter the south pole. There will be no lines exiting from it.

3. **Analyzing the Options**:
- **Option 1**: If all the magnetic lines of force are entering the pole, this represents the behavior of an isolated south pole.
- **Option 2**: If all the magnetic lines of force are exiting, this represents a north pole, making this option incorrect.
- **Option 3**: If some lines are entering and some are exiting, this does not represent an isolated south pole, making this option incorrect.
- **Option 4**: Similar to option 3, if lines are entering from one side and exiting from another, this does not represent an isolated south pole, making this option incorrect.

4. **Conclusion**:
- The only option that correctly represents the magnetic lines of force due to an isolated south pole is **Option 1**.

### Final Answer:
- The correct figure representing the magnetic lines of force due to an isolated south pole is **Option 1**.

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