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 on equatorial position?
1. 9 gauss
2. 4 gauss
3. 36 gauss
4. 4.5 gauss
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe possible value of magnetic susceptibility of a diamagnetic material can be:
1. -2.45
2. 0.75
3. -0.5
4. 1.67
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen a magnetic material is subjected to a very small magnetising force H, the intensity of magnetisation is proportional to:
1.
2.
3. H
4. H2
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAs 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA long solenoid has 1500 turns per metre and an iron core of = 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology