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Physics Question 24 – NEET-UG 2024

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Match List-I with List-II. List-IList-II(Material)(Susceptibility (χ))A. DiamagneticI. χ=0B. FerromagneticII. 0>χ≥−1C. ParamagneticIII. χ≫1D. Non-magneticIV. 0<χ<ε (a small positive number) Choose the correct answer from the options given below:

Recall the fundamental definitions and characteristics of diamagnetic, paramagnetic, and ferromagnetic materials.

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Ninja Strategy•Characteristic Susceptibility Identification

Identify the most distinct susceptibility values first, such as for ferromagnetic materials (χ≫1) and diamagnetic materials (negative χ), to quickly eliminate incorrect options.

Step 1: Define Magnetic Susceptibility for Material Types✦ Active

Magnetic susceptibility (χ) quantifies how much a material will become magnetized in an applied magnetic field. Its value and sign characterize different types of magnetic materials:

1. Diamagnetic materials: Have a small, negative susceptibility. They are weakly repelled by magnetic fields. (χ<0)

2. Paramagnetic materials: Have a small, positive susceptibility. They are weakly attracted to magnetic fields. (0<χ<1)

3. Ferromagnetic materials: Have a large, positive susceptibility. They are strongly attracted to magnetic fields and can retain magnetism. (χ≫1)

4. Non-magnetic materials: In a simplified context, a truly non-magnetic material would not respond to a magnetic field, implying a susceptibility of zero. (χ=0)

💡 Teacher's Secret Hint

Remember that all materials exhibit some form of magnetism, but these classifications are based on the dominant magnetic behavior.

Step 2: Match List-I with List-II○ Expand

Based on the definitions from Step 1, we can establish the following matches:

A. Diamagnetic: Matches with II. 0>χ≥−1 (small negative susceptibility).

B. Ferromagnetic: Matches with III. χ≫1 (very large positive susceptibility).

C. Paramagnetic: Matches with IV. 0<χ<ε (a small positive number, representing small positive susceptibility).

D. Non-magnetic: Matches with I. χ=0 (zero susceptibility, indicating no magnetic response).

Step 3: Select the Correct Option○ Expand

The correct matching is A-II, B-III, C-IV, D-I. Comparing this with the given options:

Option (1): A-II, B-I, C-III, D-IV (Incorrect)

Option (2): A-III, B-II, C-I, D-IV (Incorrect)

Option (3): A-IV, B-III, C-II, D-I (Incorrect)

Option (4): A-II, B-III, C-IV, D-I (Correct)

💡 Teacher's Secret Hint

Always cross-verify all parts of your chosen option to ensure complete accuracy.

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