Needles `N_(1) , N_(2), and N_(3)` are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively . A magnet when brought close to them will

Options

A. Attract `N_1` and `N_2` strongly but repel` N_3`
B. Attract `N_1`, strongly. but repel` N_2`, and `N_3`, weakly
C. Attract `N_1`, strongly, `N_2` weakly and repel `N_3` weakly
D. Attract all three of them

Answer

To solve the problem, we will analyze the behavior of the three types of materials (ferromagnetic, paramagnetic, and diamagnetic) when a magnet is brought close to them.

### Step-by-Step Solution:

1. **Identify the Materials:**
- Needle \( N_1 \): Ferromagnetic material
- Needle \( N_2 \): Paramagnetic material
- Needle \( N_3 \): Diamagnetic material

2. **Behavior of Ferromagnetic Materials:**
- Ferromagnetic materials (like iron) are strongly attracted to magnets. When a magnet is brought close to needle \( N_1 \), it will experience a strong attraction.

3. **Behavior of Paramagnetic Materials:**
- Paramagnetic materials (like aluminum) are weakly attracted to magnets. When a magnet is brought close to needle \( N_2 \), it will experience a weak attraction.

4. **Behavior of Diamagnetic Materials:**
- Diamagnetic materials (like bismuth) are weakly repelled by magnets. When a magnet is brought close to needle \( N_3 \), it will experience a weak repulsion.

5. **Summarizing the Effects:**
- Needle \( N_1 \) (ferromagnetic) will be **strongly attracted** to the magnet.
- Needle \( N_2 \) (paramagnetic) will be **weakly attracted** to the magnet.
- Needle \( N_3 \) (diamagnetic) will be **weakly repelled** by the magnet.

6. **Conclusion:**
- The correct answer summarizes the interactions as follows: Attract \( N_1 \) strongly, attract \( N_2 \) weakly, and repel \( N_3 \) weakly.

### Final Answer:
The correct option is: Attract \( N_1 \) strongly, attract \( N_2 \) weakly, and repel \( N_3 \) weakly.

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