Classification of magnetic materials - class-VIII
Description: classification of magnetic materials | |
Number of Questions: 35 | |
Created by: Jatin Goyal | |
Tags: magnetism and matter magnetism magnetic effects of current and magnetism physics |
Mark the correct set of ferromagnetic substances,
Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show the
Assertion : When diamagnetic material is placed in a non-uniform magnetic field, it tends to move from stronger to the weaker part of the magnetic field.
Reason : Diamagnetic materials possess strong magnetism.
Assertion : At high temperature, a ferromagnet becomes a paramagnet.
Reason : The ferromagnetic property depends on temperature.
Assertion : The product of magnetic susceptibility and absolute temperature for a paramagnetic substance is constant.
Reason : Susceptibility is positive but very small for paramagnetic substance.
If a magnetic material is having magnetic susceptibility $(\chi)=-1$, then the relative magnetic permeability $(\mu _r)$ and type of magnetic material is?
A domain in ferromagnetic iron is in the form of a cube of side length $2$ $\mu m$ then the number of iron atoms in the domain are (Molecular mass of iron $=55$g $mol^{-1}$ and density $=7.92$g $cm^{-3}$)
Which of the following is true regarding dimagnetic substances (symbols have their usual meaning)?
Susceptibility is small and negative for
Susceptibility is small and positive for
Susceptibility is large and positive for
The core of electromagnet is made of soft iron, because
a) susceptibility of soft iron is very high
b) coercivity of soft iron is very low
The value of susceptibility for super conductor is
Susceptibility is positive and large for a
A superconductor exhibits perfect:
The magnetic materials having negative magnetic susceptibility are
Which of the following group is diamagnetic?
The inherent property of all materials is
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from.
A paramagnet magnet behaves like a solenoid because both contain currents in the form of
Domain formation is the necessary features of
If a solution of ferromagnetic material is poured into a U-tube and one arm of this is placed between the poles of a strong magnet with the meniscus in line with the field, then the level of the solution will:
The susceptibility of a diamagnetic material is
The value of magnetic susceptibility for para-magnetic substance is
Relative permittivity and permeability of a material are $\varepsilon _{r}$ and $\mu _{r}$ respectively. The values of these quantities allowed for a diamagnetic material are
Magnetism is a property present in ___________.
Relative permittivity and permeability of a material are $\epsilon _{\mathrm{r}}$ and $\mu _{\mathrm{r}}$, respectively. Which of the following values of these quantifies are allowed for a diamagnetic material?
Needles $N _{1}, N _{2}$ and $N _{3}$ are made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. A magnet when brought close to them will
Curie temperature is the temperature above which
A ferromagnetic material is placed in an external magnetic field. The magnetic domains
The magnetic susceptibility is negative for
Which of the following species is para-magnetic
The relative permeability of silicon is $0.99837$ and that of palladium is $1.00692$, choose the correct option from the following :
The relative permeability of a material is $0.9$. The material is
The susceptibility of a diamagnetic substance is