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Magnetism and Matter

AIPMT 2005MCQEasy📈 Topic in 25% papers+4−1
Ques. 1AIPMT 2005

If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by d, p and f respectively, then

  1. d = 0 and p 0
  2. d 0 and p = 0
  3. p = 0 and f 0
  4. d 0 and f 0

Answer

(1) d = 0 and p 0

Solution

As per NCERT, the atoms of a diamagnetic substance have no net (permanent) magnetic moment d = 0

Atoms of paramagnetic and ferromagnetic substances possess a permanent magnetic dipole moment p 0, f 0

Answer: (1)

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Ques. 2AIPMT 2003

A diamagnetic material in a magnetic field moves

  1. from stronger to the weaker parts of the field
  2. from weaker to the stronger parts of the field
  3. perpendicular to the field
  4. in none of the above directions
Ques. 3AIPMT 2003

According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature T is proportional to

  1. 1/T
  2. T
  3. 1/T2
  4. T2
Ques. 4AIPMT 2003

A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its mass is quadrupled?

  1. motion remains simple harmonic with time period = T2
  2. motion remains S.H.M. with time period = 2T
  3. motion remains S.H.M. with time period = 4T
  4. motion remains S.H.M. and period remains nearly constant
Ques. 5AIPMT 2002

Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is T1. Now the polarity of one of the magnets is reversed then time period of oscillation is T2, then

  1. T1 < T2
  2. T1 = T2
  3. T1 > T2
  4. T2 =
Ques. 6AIPMT 2001

Among which the magnetic susceptibility does not depend on the temperature?

  1. diamagnetism
  2. paramagnetism
  3. ferromagnetism
  4. ferrite
Ques. 7AIPMT 2001

Tangent galvanometer is used to measure

  1. potential difference
  2. current
  3. resistance
  4. charge

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