The apparent dip at a place is always greater than or equal to the value of true dip at that place. This is due to

1.  An increase in the apparent value of BV

2. A decrease in the apparent value of BH

3. An increase in the apparent value of BH

4. Both (1) & (2)

Level 3: 35%-60%
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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
 53%
Level 3: 35%-60%
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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%
Level 1: 80%+
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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 |
 68%
Level 2: 60%+
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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

 72%
Level 2: 60%+
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Elements of Earth's magnetism is/are

1. Magnetic declination

2. Magnetic Inclination (or dip)

3. The horizontal component of the earth's magnetic field

4. All of these

 93%
Level 1: 80%+
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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°

 77%
Level 2: 60%+
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As we go from the magnetic equator towards the geographic south pole, the angle of the dip will become:

1. More and more vertically downward and perpendicular to the surface at the magnetic pole.
2. More and more vertically upward and perpendicular to the surface at the magnetic pole.
3. Less and less vertically downward and horizontal at the magnetic pole.
4. Less and less vertically upward and horizontal at the magnetic pole.
 51%
Level 3: 35%-60%
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Soft iron is used to manufacture electromagnets because:

1. It has a high permeability.
2. Its retentivity and coercivity are small.
3. Its retentivity and coercivity are high.
4. Both (1) & (2)

Subtopic:  Magnetic Materials |
 70%
Level 2: 60%+
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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%
Level 1: 80%+
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