Download App

STD 12 - 5. Magnetism and matter — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - 5. Magnetism and matter4 Marks
MCQ
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement
  • A
    Ferromagnetic domains are perfectly arranged
  • ✓
    Ferromagnetic domains becomes random
  • C
    Ferromagnetic domains are not influenced
  • D
    Ferromagnetic material changes itself into diamagnetic material
✓

Answer

Correct option: B.
Ferromagnetic domains becomes random
b
(b)On heating, different domains have net magnetisation in them which are randomly distributes. Thus the net magnetisastion of the substance due to various domains decreases to minimum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

JEE STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

The equation of progressive wave is $y = a\sin (200\,t - x)$. where $x$ is in meter and $t$ is in second. The velocity of wave is  ..... $m/sec$
→
If electronic charge on electron alone is doubled then as per bohr model, $K.E.$ of an $e^-$ revolving in the $n^{th}$ orbit becomes
→
An electric kettle has two heating coils. When one of the coils is connected to an a.c. sotuce, the water in the kettle boils in $10$ minutes. When the other coil is used the w’ater boils in $40$ minutes. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be ...... $min$
→
The binding energy of nucleons in a nucleus can be affected by the pairwise Coulomb repulsion. Assume that all nucleons are uniformly distributed inside the nucleus. Let the binding energy of a proton be $E_b^p$ and the binding energy of a neutron be $E_b^n$ in the nucleus.

Which of the following statement($s$) is(are) correct?

$(A)$ $E_b^p-E_b^n$ is proportional to $Z(Z-1)$ where $Z$ is the atomic number of the nucleus.

$(B)$ $E_b^p-E_b^n$ is proportional to $A^{-\frac{1}{3}}$ where $A$ is the mass number of the nucleus.

$(C)$ $E_b^p-E_b^n$ is positive.

$(D)$ $E_b^p$ increases if the nucleus undergoes a beta decay emitting a positron.

→
At a given point of time the value of displacement of a simple harmonic oscillator is given as $y = A \cos \left(30^{\circ}\right)$. If amplitude is $40\,cm$ and kinetic energy at that time is $200\, J$, the value of force constant is $1.0 \times 10^{ x }\,Nm ^{-1}$. The value of $x$ is ......
→
In a heat engine, the temperature of the source and sink are $500\, K$ and $375\, K$. If the engine consumes $25\times10^5\, J$ per cycle, the work done per cycle is
→
In a certain double slit experimental arrangement interference fringes of width $ 1.0 mm$  each are observed when light of wavelength $ 5000 Å $ is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength $6000 Å, $ the fringe width will be......$mm$
→
A wire of magnetic moment $M$ is moulded according to figure, then magnetic moment becomes
→
A bullet $10\,g$ leaves the barrel of gun with a velocity of $600\,m / s$. If the barrel of gun is $50\,cm$ long and mass of gun is $3\,kg$, then value of impulse supplied to the gun will be $.....\,Ns$
→
Which one has the dimensions different from the remaining three
→