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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Which of the following statements is correct for diamagnetic materials? - Physics

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प्रश्न

Which of the following statements is correct for diamagnetic materials?

पर्याय

  • μr < 1

  • χ is negative and low

  • χ does not depend on temperature

  • All of the above

MCQ
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उत्तर

All of the above.

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पाठ 11: Magnetic Materials - Exercises [पृष्ठ २६३]

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बालभारती Physics [English] Standard 12 Maharashtra State Board
पाठ 11 Magnetic Materials
Exercises | Q 1.3 | पृष्ठ २६३

संबंधित प्रश्‍न

An iron rod of the area of cross-section 0.1m2 is subjected to a magnetizing field of 1000 A/m. Calculate the magnetic permeability of the iron rod. [Magnetic susceptibility of iron = 59.9, magnetic permeability of vacuum = 4π x 10-7 S. I. unit]  


The susceptibility of magnesium at 200 K is 1.8 x 10-5. At what temperature will the susceptibility decrease by 6 x 10-6?


Distinguish between diamagnetic and paramagnetic substances.


The susceptibility of a magnetic material is 0·9853. Identify the type of magnetic material. Draw the modification of the field pattern on keeping a piece of this material in a uniform magnetic field.


Explain Curie’s law for a paramagnetic substance.


A tangent galvanometer shows a deflection of 45° when 10 mA of current is passed through it. If the horizontal component of the earth's magnetic field is `B_H = 3.6 xx 10^-5  "T"` and radius of the coil is 10 cm, find the number of turns in the coil.


The magnetic susceptibility of platinum is 0.0001. It's relative permeability is: 


Two substances A and B have their relative permeability slightly greater and slightly less than 1 respectively. What do you conclude about A and B as far as their magnetic materials are concerned?


Answer the following question.
Write three points of differences between para-, dia- and ferromagnetic materials, giving one example for each. 


Choose the correct option:

A magnetising field of 360 Am−1 produces a magnetic flux density (B) = 0.6T in a ferromagnetic material. What is its permeability in Tm A−1?


The susceptibility of a paramagnetic material is χ at 27° C. At what temperature its susceptibility be χ/3?


A rod of magnetic material of cross-section 0.25 cm2 is placed in a magnetizing field of intensity 4000 A/m-1. The magnetic flux passing through the rod is 25 × 10-6 Wb. Find out

(a) relative permeability

(b) magnetic susceptibility and 

(c) magnetisation of the rod.


The susceptibility of a magnetic material is positive and small. The material is ______.


The magnetic property of magnetic substance is associated with ____________.


Above the curie temperature the susceptibility of ferromagnetic substance varies ____________.


A sphere of gold when brought towards a powerful magnet experiences ____________.


The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?


Which graph shows the variation of magnetic susceptibility (`chi`) with magnetizing field (H) for a paramagnetic substance?


Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?


If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is empty?


Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.) Why?


Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?


Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond curie temperature, then it will show ______.


The given figure represents a material which is ______.


Assertion: The ferromagnetic substance do not obey Curie’s law.
Reason: At Curie point a ferromagnetic substance start behaving as a paramagnetic substance.


The coercivity of a small magnet where the ferromagnet gets demagnetized is 3 × 103 Am–1. The current required to be passed in a solenoid of length 10 cm and number of turns 100, so that the magnet gets demagnetized when inside the solenoid, is ______.


Which magnetic materials have negative susceptibility?

If a diamagnetic substance is brought near north or south pole of a bar magnet, it is ______.

Of dia, para and ferromagnetism, the universal property of all substances is ______.

Curie temperature is the temperature above which ______.

Core of elctromagnets are made of ferromagnetic materials which have ______.

Two identical bar magnets are fixed with their centres at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magnets at a distance D from the centre O as shown in the figure. The force on the charge Q is ______.


The magnetic susceptibility for diamagnetic materials is ______.


A hydrogen atom is paramagnetic. A hydrogen molecule is


For a diamagnetic material


If a charged particle at rest experience no electromagnetic force


Explain quantitatively the order of magnitude difference between the diamagnetic susceptibility of N2 (~5 × 10–9) (at STP) and Cu (~10–5).


A uniform magnetic field gets modified as shown in figure when two specimens A and B are placed in it.

(a) (b)
  1. Identify the specimen A and B.
  2. How is the magnetic susceptibility of specimen A different from that of specimen B?

  • Assertion (A): Diamagnetic substances exhibit magnetism.
  • Reason (R): Diamagnetic materials do not have a permanent magnetic dipole moment.

Which of the following has a permeability less than that of free space?


What is magnetic hysterisis?


Explain the origin of paramagnetism on the basis of atomic structure.


State the dimensions of magnetization.


Explain the Domain theory in brief.


Explain the meaning of the following statement:

Curie temperature for soft iron is 770°C.


Magnetic susceptibility of a diamagnetic substance ______.


Match List-I with List-II.

  List-I (Material)   List-II (Susceptibility)
A. Diamagnetic I. χ = 0
B. Ferromagnetic II. 0 > χ ≥ −1
C. Paramagnetic III. χ >> 1
D. Non-magnetic IV. 0 < χ < ε

Choose the correct answer from the options given below:


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