A ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet. In which direction will it move?

Options

A. Away from bar magnet
B. Towards the bar magnet
C. Around the bar magnet
D. Remain constant

Explanation

**Step-by-Step Solution:**

1. **Understanding the Materials**:
- The ball is made of superconducting material and is dipped in liquid nitrogen. Both superconductors and liquid nitrogen exhibit diamagnetic properties.

2. **Identifying the Properties**:
- A diamagnetic material is one that creates an opposing magnetic field when exposed to an external magnetic field. This means that when a diamagnetic material is placed in a magnetic field, it will experience a force that pushes it away from the source of the magnetic field.

3. **Analyzing the Bar Magnet**:
- A bar magnet has a north pole and a south pole. The magnetic field lines emerge from the north pole and enter the south pole.

4. **Placing the Ball Near the Bar Magnet**:
- When the superconducting ball is placed near the bar magnet, it will respond to the magnetic field created by the bar magnet.

5. **Direction of Movement**:
- Since the ball is diamagnetic, it will be repelled by the magnetic field of the bar magnet. Therefore, the ball will move away from the bar magnet.

6. **Conclusion**:
- The ball will move in the direction opposite to the bar magnet, which means it will move away from the bar magnet.

**Final Answer**: The ball will move away from the bar magnet.

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