Given below are two statements: 

Statement I: \(\oint \vec{B} \cdot \overrightarrow{d s}=0\) because magnetic monopoles do not exist.
Statement II: \(\oint \vec{B} \cdot \overrightarrow{d s}=0\) means the magnetic field is zero.

1. Statement I is false but Statement II is true.
2. Both Statement I and Statement II are true.
3. Both Statement I and Statement II are false.
4. Statement I is true but Statement II is false

Subtopic:  Analogy between Electrostatics & Magnetostatics |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements: 

Assertion (A): Magnetic dip at the pole is  0 ∘ .
Reason (R): Magnetic field at the pole is directed horizontally.
 
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. Both (A) and (R) are false.
Subtopic:  Earth's Magnetism (OLD NCERT) |
 65%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The horizontal component of the earth's magnetic field at a place is 3×10-4 T and the dip is tan-143. A metal rod of length 0.25 m placed in the north-south position and is moved at a constant speed of 10cm/s towards the east. The emf induced across the length of the rod will be

1. Zero

2. 1 μV

3. 5 μV

4. 10 μV

Subtopic:  Earth's Magnetism (OLD NCERT) |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Choose the correct statement regarding magnetism.

1. Paramagnetic sample displays greater magnetization when cooled.
2. Diamagnetism is almost independent of temperature.
3. Ferromagnetic substances show hysteresis.
4. All of these.

Subtopic:  Magnetic Materials |
 91%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A long solenoid has 1500 turns per metre and an iron core of μr = 1100 is kept inside it. 2A current flows in the coil of the solenoid. If the core is heated beyond curie temperature, then:

1. The H and B fields in the solenoid reduce to zero.
2. The H and B fields in the solenoid remain unchanged.
3. The H field in the solenoid is nearly unchanged but B field decreases significantly.
4. The B field in the solenoid is nearly unchanged but the H field decreases significantly.
Subtopic:  Curie's Law and Hysteresis (OLD NCERT) |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

At angle cos-113 to the magnetic meridian, the apparent dip is 60°. The true dip at the place is :

1. 30°

2. 45°

3. 0°

4. 60°

Subtopic:  Earth's Magnetism (OLD NCERT) |
 78%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A material when heated suddenly changes its magnetic property at a particular temperature and above this temperature, its susceptibility is found to be inversely proportional to the absolute temperature. The material may be:

1. Ferromagnetic

2. Diamagnetic

3. Paramagnetic

4. Ferromagnetic or Paramagnetic

Subtopic:  Curie's Law and Hysteresis (OLD NCERT) |
 72%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A Gaussian surface is drawn enclosing the N-pole of a bar magnet. The net magnetic flux through the Gaussian surface will be:
(pole strength of N-pole is treated as positive and S-pole as negative)

   

1. positive.
2. negative.
3. positive or negative.
4. zero.

Subtopic:  Bar Magnet |
 66%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The magnetization of a piece of iron or steel:

1. depends on the strength of the magnetizing field.
2. depends on external conditions such as temperature.
3. cannot be done beyond the saturation point.
4. all of these.

Subtopic:  Magnetization & Magnetic Intensity |
 88%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

If a bar magnet is kept on a horizontal plane with N-pole of bar magnet facing geographic N-pole and S-pole of bar magnet facing geographic S-pole, then the number of neutral points is:

1. 0 2.
3. 2 4. Infinite
Subtopic:  Earth's Magnetism (OLD NCERT) |
 52%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh