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#1 Class 12 Physics Magnetism and Matter 2020 Short 2M CBSE
State Gauss's law of magnetism. What are its important consequences?
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#2 Class 12 Physics Magnetism and Matter 2008 Short 2M CBSE
Two identical iron bars A and B are given, one of which is definitely known to be magnetised. How would you ascertain whether both are magnetised, or only one?
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#3 Class 12 Physics Magnetism and Matter 2019 Short 2M CBSE
Define magnetic dipole and magnetic dipole moment. What are their units?
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#4 Class 12 Physics Magnetism and Matter 2007 Short 2M CBSE
An iron bar is heated to 1000°C and then cooled in a magnetic field-free space. Will it retain its magnetism? Give reason.
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#5 Class 12 Physics Magnetism and Matter 2021 Short 3M CBSE
Derive the relation between relative magnetic permeability $\mu_r$ and magnetic susceptibility $\chi_m$.
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#6 Class 12 Physics Magnetism and Matter 2020 Short 2M CBSE
A magnetic needle suspended freely in a uniform magnetic field experiences a torque but no net force. An iron nail near a bar magnet experiences both a force of attraction and a torque. Why?
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#7 Class 12 Physics Magnetism and Matter 2021 Short 3M CBSE
(1) How does a diamagnetic material behave when cooled to very low temperature? (2) Why does a paramagnetic sample display greater magnetisation when cooled? Explain.
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#8 Class 12 Physics Magnetism and Matter 2020 Short 2M CBSE
State two characteristic properties distinguishing the behaviour of paramagnetic and diamagnetic materials.
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#9 Class 12 Physics Magnetism and Matter 2019 Short 2M CBSE
Why does a magnetic dipole possess potential energy when placed at some inclination with the direction of the magnetic field?
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#10 Class 12 Physics Magnetism and Matter 2018 Short 2M CBSE
Why cannot two magnetic field lines due to a bar magnet cross each other?
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#11 Class 12 Physics Magnetism and Matter 2019 Short 1M CBSE
The permeability of a magnetic material is 0.9983. Name the type of magnetic material it represents.
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#12 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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#13 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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#14 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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#15 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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#16 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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#17 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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#18 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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#19 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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#20 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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