Select Chapter Topics:
Q. No.In a uniform magnetic field of 0.049 T, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is 9.8×10−6 kg m2. If the magnitude of magnetic moment of the needle is x×10−5 Am2; then the value of 'x' is:
| 1. | 128π2 | 2. | 50π2 |
| 3. | 1280π2 | 4. | 5π2 |
Subtopic: Bar Magnet |
53%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I Material |
List-II Susceptibility (χ) |
||
| (A) | Diamagnetic | (I) | χ=0 |
| (B) | Ferromagnetic | (II) | 0>χ≥−1 |
| (C) | Paramagnetic | (III) | χ≫1 |
| (D) | Non-magnetic | (IV) | 0<χ<ε (a small positive number) |
| 1. | A-II, B-I, C-III, D-IV | 2. | A-III, B-II, C-I, D-IV |
| 3. | A-IV, B-III, C-II, D-I | 4. | A-II, B-III, C-IV, D-I |
Subtopic: Magnetic Materials |
70%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
An iron bar of length L has a magnetic moment M. It is bent at the middle of its length such that the two arms make an angle 60∘ with each other. The magnetic moment of this new magnet is:
| 1. | M2 | 2. | 2M |
| 3. | M√3 | 4. | M |
Subtopic: Bar Magnet |
53%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The length of a magnetized iron bar is L and its magnetic moment is M. When this bar is bent to form a semicircle its magnetic moment is:
| 1. | M | 2. | Mπ2 |
| 3. | M2π | 4. | 2Mπ |
Subtopic: Bar Magnet |
77%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Match List-I with List-II
Choose the correct answer from the options given below:
| List-I (Material) | List-II (Example) | ||
| (A) | Diamagnet | (I) | Alnico |
| (B) | Paramagnet | (II) | Copper |
| (C) | Soft ferromagnet | (III) | Aluminium |
| (D) | Hard ferromagnet | (IV) | Gadolinium |
| 1. | A-I, B-II, C-III, D-IV |
| 2. | A-IV, B-III, C-II, D-I |
| 3. | A-III, B-II, C-I, D-IV |
| 4. | A-II, B-III, C-IV, D-I |
Subtopic: Magnetic Materials |
60%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The best suited curve showing the variations of susceptibility (χ) of a paramagnetic material in free space with temperature (T) is:
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Magnetic Materials |
87%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The magnetic potential energy when a magnetic bar with a magnetic moment →M is placed perpendicular to the magnetic field →B is:
| 1. | −mB2 | 2. | zero |
| 3. | −mB | 4. | mB |
Subtopic: Analogy between Electrostatics & Magnetostatics |
75%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and ε is a small positive number) is:
1. μ<μ0
2. 0⩽μr<1
3. −1⩽χ<0
4. 1<μr<1+ε
1. μ<μ0
2. 0⩽μr<1
3. −1⩽χ<0
4. 1<μr<1+ε
Subtopic: Magnetic Materials |
60%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The magnetic moment and moment of inertia of a magnetic needle as shown are, respectively, 1.0×10−2 A m2 and 10−6π2 kg m2. If it completes 10 oscillations in 10 s, the magnitude of the magnetic field is:
1. 0.4 T
2. 4 T
3. 0.4 mT
4. 4 mT
1. 0.4 T
2. 4 T
3. 0.4 mT
4. 4 mT
Subtopic: Magnetization & Magnetic Intensity |
79%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60∘ at the centre. The magnetic moment of this arc section is:
| 1. | 3Mπ | 2. | 4Mπ |
| 3. | Mπ | 4. | 2Mπ |
Subtopic: Bar Magnet |
78%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Select Chapter Topics:
© 2025 GoodEd Technologies Pvt. Ltd.