[Free] IIT JAM Physics Test Series 2023 : Solid State Physics – (Magnetic Properties of Solids)

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Now In this Post of IIT JAM Physics Test Series, you will get a test of the topic Magnetic Properties of Solids of Chapter Solid State Physics. There are total 15 Questions given below also Answers are attached at the end of the test so that you can verify your answers after completing the test. So, Practice these Questions and Do your Best. Also Solve IIT JAM Physics Previous Year Question Paper. And Don’t Forget to Share with Your Friends.


[Free] IIT JAM Physics Test Series 2023 : Solid State Physics – (Magnetic Properties of Solids)


Q1. The susceptibility of a diamagnetic material is:

  • (A) Positive and proportional to temperature 
  • (B) Negative and inversely proportional to temperature 
  • (C) Negative and independent of temperature 
  • (D) Positive and inversely proportional to temperature.

Q2. The following are the plots of the temperature dependence of the magnetic susceptibility for three different samples. The plots A, B and C correspond to

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  • (A) Ferromagnet, paramagnet and diamagnet, respectively. 
  • (B) Paramagnet, diamagnet and ferromagnet, respectively 
  • (C) Ferromagnet, diamagnet and paramagnet, respectively 
  • (D) Diamagnet, paramagnet and ferromagnet, respectively.

Q3. The magnetic susceptibility χ of three samples A, B and C, is measured as a function of their absolute temperature T, leading to the graphs shown below. From these graphs, the magnetic nature of the samples can be inferred to be

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  • (A) A: anti-ferromagnet B: paramagnet C: ferromagnet 
  • (B) A: diamagnet B: paramagnet C: anti-ferromagnet 
  • (C) A: paramagnet B: anti-ferromagnet C: ferromagnet 
  • (D) A: anti-ferromagnet B: diamagnet C: paramagnet

Q4. A ferromagnetic material has a Curie temperature 100 K then,

  • (A) Its susceptibility is doubled when it is cooled from 300 K to 200 K. 
  • (B) All the atomic magnets in it get oriented in the same direction above. 
  • (C) The plot of inverse susceptibility versus temperature is linear with a slope (Tc). 
  • (D) The plot of its susceptibility versus temperature is linear with an intercept Tc

Q5. An external magnetic field of magnitude H is applied to a type-I superconductor at temperature below the transition point. Then which one of the following statements is not true for H less than the critical field Hc ?

  • (A) The sample is diamagnetic. 
  • (B) Its magnetization varies linearly with H. 
  • (C) The lines of magnetic induction are pushed out from the sample. 
  • (D) The sample exhibits mixed states of magnetization near Hc

Q6. The critical magnetic field for a solid in superconducting state

  • (A) does not depend upon temperature
  • (B) increases if the temperature increases 
  • (C) increases if the temperature decreases 
  • (D) does not depend on the transition temperature

Q7. The unit of magnetic moment is

  • (A) erg-gauss 
  • (B) (erg gauss)-1
  • (C) m-gauss 
  • (D) Bohr magneton

Q8. A permanent magnet when heated above a critical temperature becomes

  • (A) diamagnetic 
  • (B) ferromagnetic 
  • (C) ferrimagnetic 
  • (D) paramagnetic

Q9. The magnetic material in which permanent magnetic dipoles arising due to electron spins are already aligned due to bonding forces is known as

  • (A) paramagnetic material 
  • (B) ferromagnetic material 
  • (C) ferrimagnetic material 
  • (D) diamagnetic material

Q10. The susceptibility of a diamagnetic material is about

  • (A) -10-5 
  • (B) 10-7 
  • (C) 102 
  • (D) 103

Q11. A solid sample has the property that, when cooled below a certain temperature, it expels any small applied magnetic field form within the material. Which of the following best describes this sample in the cooled state ?

  • (A) Paramagnet 
  • (B) Diamagnet 
  • (C) Ferromagnet 
  • (D) Antiferromagnet

Q12. A paramagnetic gas at room temperature is placed in an external magnetic field of 1.5 T (tesla). Each atom of the gas has a magnetic moment μ = 1.0 μ’ , where μ’ = 9.3 × 10 J/T is the Bohr magneton. The difference in energy when an atom is aligned along the magnetic field and opposite to it, is

  • (A) 2.8 × 10-23
  • (B) 1.4 × 10-23
  • (C) 18.6 × 10-24
  • (D) 9.3 × 10-24 J

Q13. The dependencies of the magnetic susceptibility (χ) of a material with temperature (T) can be represented by χ ∝ 1/(T-θ) , where θ is the Curie-Weiss temperature. The plot of magnetic susceptibility versus temperature is sketched in the figure, as curve P, Q, and R with curve Q having θ = 0. Which one of the following statements is correct ?

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  • (A) curve R represents a paramagnet and Q a ferromagnet. 
  • (B) curve Q represents a ferromagnet and P an antiferromagnet. 
  • (C) curve R represents an antiferromagnet and Q a paramagnet. 
  • (D) curve R represents an antiferromagnet and Q a ferromagnet.

Q14. The high temperature magnetic susceptibility of solids having ions with magnetic moments can be described by χ ∝ 1/(T + θ) where T as absolute temperature and eas constant. The three behaviors i.e., paramagnetic, ferromagnetic an antiferromagnetic are described, respectively, by

  • (A) θ 0, θ = 0 
  • (B) θ > 0, θ < 0, θ = 0 
  • (C) θ = 0, θ 0 
  • (D) θ = 0, θ > 0, θ < 0

Q15. Very low temperature can be produced by

  • (A) Adiabatic demagnetisation of a paramagnetic salt 
  • (B) Adiabatic magnetisation of a paramagnetic salt 
  • (C) Isothermal magnetisation of diamagnetic salt 
  • (D) Isothermal demagnetisation of diamagnetic salt

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Answer Key (if you find any answer wrong, feel free to Correct us)

01.(C)06.(C)11.(B)
02.(B)07.(D)12.(A)
03.(A)08.(D)13.(C)
04.(A)09.(B)14.(C)
05.(D)10.(A)15.(A)

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