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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Which of the following statements is correct for diamagnetic materials?

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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

Which of the following substances is ductile?


Out of the two magnetic materials, 'A' has relative permeability slightly greater than unity while 'B' has less than unity. Identify the nature of the materials 'A' and 'B'. Will their susceptibilities be positive or negative?


A meter gauge train is heading north with speed 54 km/hr in earth's magnetic field 3 x 10-4T. The e.m.f. induced across the axle joining the wheels is ..........

(a) 0.45 mV

(b) 4.5 mV

(c) 45 mV

(d) 450 m V


Explain Curie’s law for a paramagnetic substance.


Which of the following substances are para-magnetic?

Bi, Al, Cu, Ca, Pb, Ni


The relative magnetic permeability of a magnetic material is 800. Identify the nature of magnetic material and state its two properties.


Draw magnetic field line when a (i) diamagnetic, (ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field line due to the substances?


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. 


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.


Two identical bar magnets each of magnetic moment M, separated by some distance are kept perpendicular to each other. The magnetic induction at a point at the same distance d from the centre of magnets, is (µ0 = permeability of free space)


A domain in a ferromagnetic substance is in the form of a cube of side 1 µm. If it contains 8 × 1010 atoms and each atomic dipole has a dipole moment of 9 × 10-24 Am2 then the magnetisation of the domain is ______.


Magnetization of the sample is ______.


Magnetic material can be easily magnetized if magnetic susceptibility is ______.


If a magnetic field is applied to a liquid in one arm of a narrow U-tube, the liquid level in that arm is lowered. The liquid in U-tube arm is ______.


There are three needles 'N1', 'N2' and 'N3' made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. When a magnet is brought close to them, then it will ____________.


The magnetic property of magnetic substance is associated with ____________.


A small quantity of paramagnetic liquid is taken in a watch - glass and kept on two dissimilar magnetic poles. The liquid ____________.


A domain in a ferromagnetic substance is in the form of a cube of side length 1 µm. If it contains 6 x 1010 atoms and each atomic dipole has a dipole moment of 7 x 10-24 Am2, then magnetization of the domain is ____________.


A short bar magnet has a magnetic moment of 0.48 J T−1. Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on

  1. the axis,
  2. the equatorial lines (normal bisector) of the magnet.

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


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?


Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a ferromagnet.


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


Assertion: A paramagnetic sample display greater magnetisation (for the same magnetic field) when cooled.
Reason: The magnetisation does not depend on temperature.


The magnetic susceptibility is negative for ______.


Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called ______.


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

Curie temperature is the temperature above which ______.

A material is placed in a magnetic field and it is thrown out of it. Then the material is ______.

The magnetic susceptibility for diamagnetic materials is ______.


When a ferromagnetic material is created above its curie temperature


A hydrogen atom is paramagnetic. A hydrogen molecule is


If a charged particle at rest experience no electromagnetic force


Essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding is due to ______.

  1. electrostatic field lines can end on charges and conductors have free charges.
  2. lines of B can also end but conductors cannot end them.
  3. lines of B cannot end on any material and perfect shielding is not possible.
  4. shells of high permeability materials can be used to divert lines of B from the interior region.

A permanent magnet in the shape of a thin cylinder of length 10 cm has M = 106 A/m. Calculate the magnetisation current IM.


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


From molecular view point, discuss the temperature dependence of susceptibility for diamagnetism, paramagnetism and ferromagnetism.


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?

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


Which of the following cannot modify an external magnetic field as shown in the figure?

 


The relative magnetic permeability of a substance X is slightly less than unity and that of substance Y is slightly more than unity, then ______.


What is magnetic hysterisis?


Explain ferromagnetism on the basis of the domain theory.


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


Explain the Domain theory in brief.


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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