# Due to a small magnet, the intensity at a distance x in the end-on position is 9 gauss. What will be the intensity at a distance $\frac{x}{2}$ on equatorial position? 1. 9 gauss 2. 4 gauss 3. 36 gauss 4. 4.5 gauss

Subtopic:  Bar Magnet |
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The possible value of magnetic susceptibility of a diamagnetic material can be:

1. -2.45

2. 0.75

3. -0.5

4. 1.67

Subtopic:  Magnetic Materials |
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The bar magnet A of magnetic moment MA is found to oscillate at a frequency twice that of magnet B of magnetic moment MB and the same moment of inertia when placed in a vibration magnetometer. We may say that:

1. MB = 8MA

2. MA = 4MB

3. MA = 8MB

4. MA = 2MB

Subtopic:  Analogy between Electrostatics & Magnetostatics |
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When a magnetic material is subjected to a very small magnetising force H, the intensity of magnetisation is proportional to:

1. $\frac{1}{\sqrt{H}}$

2. $\sqrt{H}$

3. H

4. H2

Subtopic:  Magnetization & Magnetic Intensity |
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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. 1

3. 2

4. Infinite

Subtopic:  Earth's Magnetism |
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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 |
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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 |
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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

Subtopic:  Curie's Law and Hysteresis |
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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.
Subtopic:  Earth's Magnetism |
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A long solenoid has 1500 turns per metre and an iron core of ${\mu }_{r}$ = 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 |
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