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Magnetism and Matter · Question 31

AIPMT 2003MCQEasy📈 Topic in 25% papers+4−1
1

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

Answer

(1) from stronger to the weaker parts of the field

Solution

As per NCERT, diamagnetic substances are those which have a tendency to move from stronger to the weaker part of the external magnetic field (they are repelled by a magnet).

∵ Their induced magnetic moment is opposite to the applied field.

Answer: (1)

AIPMT 2003

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2

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
AIPMT 2003
3

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
AIPMT 2003
4

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 =
AIPMT 2002
5

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

  1. diamagnetism
  2. paramagnetism
  3. ferromagnetism
  4. ferrite
AIPMT 2001
6

Tangent galvanometer is used to measure

  1. potential difference
  2. current
  3. resistance
  4. charge
AIPMT 2001

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