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#1 Class 12 Physics Magnetism and Matter 2023 Long 1M CBSE
Assertion: A paramagnetic sample displays greater magnetisation (for the same magnetic field) when cooled. Reason: The magnetisation does not depend on temperature.
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#2 Class 12 Physics Magnetism and Matter 2022 Long 1M CBSE
Assertion: Diamagnetic materials can exhibit magnetism. Reason: Diamagnetic materials have permanent magnetic dipole moment.
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#3 Class 12 Physics Magnetism and Matter 2021 Mcq 1M CBSE
The relative magnetic permeability of substance X is slightly less than unity and that of substance Y is slightly more than unity. Then
A. X is paramagnetic and Y is ferromagnetic
B. X is diamagnetic and Y is ferromagnetic
C. X and Y both are paramagnetic
D. X is diamagnetic and Y is paramagnetic
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#4 Class 12 Physics Magnetism and Matter 2020 Short 1M CBSE
If $\chi_{m1}$ and $\chi_{m2}$ are the susceptibilities of a diamagnetic substance at temperatures $T_1$ and $T_2$ respectively, what is the relation between them?
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#5 Class 12 Physics Magnetism and Matter 2019 Mcq 1M CBSE
Substances which are strongly attracted by a magnetic field and move from weaker to stronger regions of the field are termed as
A. diamagnetic substances
B. paramagnetic substances
C. ferromagnetic substances
D. non-magnetic substances
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#6 Class 12 Physics Magnetism and Matter 2018 Mcq 1M CBSE
Domain formation is a necessary feature of
A. diamagnetism
B. paramagnetism
C. ferromagnetism
D. all of these
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#7 Class 12 Physics Magnetism and Matter 2021 Mcq 1M CBSE
A frog can be levitated in a magnetic field produced by a current in a vertical solenoid placed below the frog. This is possible because the body of the frog behaves as
A. paramagnetic
B. diamagnetic
C. ferromagnetic
D. anti-ferromagnetic
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#8 Class 12 Physics Magnetism and Matter 2020 Mcq 1M CBSE
The magnetic susceptibility does NOT depend upon temperature in
A. ferrite substances
B. ferromagnetic substances
C. diamagnetic substances
D. paramagnetic substances
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#9 Class 12 Physics Magnetism and Matter 2019 Mcq 1M CBSE
A diamagnetic material in a magnetic field moves
A. from weaker to stronger parts of the field
B. perpendicular to the field
C. from stronger to weaker parts of the field
D. none of the above
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#10 Class 12 Physics Magnetism and Matter 2018 Mcq 1M CBSE
Liquid oxygen remains suspended between two poles of a magnet because it is
A. diamagnetic
B. paramagnetic
C. ferromagnetic
D. anti-ferromagnetic
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#11 Class 12 Physics Magnetism and Matter 2019 Mcq 1M CBSE
Metals getting magnetised by orientation of atomic magnetic moments in an external magnetic field are called
A. diamagnetics
B. paramagnetics
C. ferromagnetics
D. anti-magnetics
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#12 Class 12 Physics Magnetism and Matter 2021 Mcq 1M CBSE
If a bar magnet is dropped into an infinitely long vertical copper tube, the magnet will
A. move with increasing velocity and acceleration
B. move with increasing velocity but constant acceleration
C. decelerate and come to rest
D. accelerate and ultimately acquire a constant terminal velocity
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#13 Class 12 Physics Magnetism and Matter 2020 Mcq 1M CBSE
Which of the following is an example of a diamagnetic substance?
A. copper
B. nickel
C. aluminium
D. iron
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#14 Class 12 Physics Magnetism and Matter 2019 Mcq 1M CBSE
The magnetic field at a distance $r$ from a short bar magnet is directly proportional to
A. $r^2$
B. $r^{-3}$
C. $r^{2/3}$
D. $r^4$
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#15 Class 12 Physics Magnetism and Matter 2018 Mcq 1M CBSE
If a material placed in a magnetic field is thrown out of it, then the material is
A. diamagnetic
B. paramagnetic
C. ferromagnetic
D. non-magnetic
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#16 Class 12 Physics Magnetism and Matter 2020 Mcq 1M CBSE
When the intensity of the magnetic field is increased four times, the time period of a suspended magnetic needle becomes
A. double
B. half
C. four times
D. one-fourth
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#17 Class 12 Physics Magnetism and Matter 2019 Short 1M CBSE
What is the SI unit of magnetic moment?
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#18 Class 12 Physics Magnetism and Matter 2017 Mcq 1M CBSE
The SI unit of pole strength is
A. N
B. N/A-m
C. A-m
D. T
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#19 Class 12 Physics Magnetism and Matter 2018 Mcq 1M CBSE
The relative permeability $\mu_r$ of a ferromagnetic substance is
A. $\mu_r \gg 1$
B. $\mu_r = 1$
C. $\mu_r < 1$
D. $\mu_r = 0$
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#20 Class 12 Physics Magnetism and Matter 2020 Short 2M CBSE
A wire of magnetic dipole moment $M$ and length $L$ is bent into the shape of a semicircle of radius $r$. What will be its new magnetic dipole moment?
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