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Previous Year Questions

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Board, class, subject, chapter, year-wise PYQ. Practice effectively and ace your board exams.

9,374 Questions
CBSE
#1 Class 12 Physics Electromagnetic Induction 2019 Mcq 1M
A 2 m long solenoid with radius 2 cm and 2000 turns has another solenoid of 1000 turns wound closely near its mid-point. The mutual inductance of the solenoids is
A. 0.8 mH
B. 1.6 mH
C. 3.2 mH
D. 6.4 mH
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CBSE
#2 Class 12 Physics Electromagnetic Induction 2021 Short 2M
A metallic rod of length $l$ is placed normal to the magnetic field $B$ and revolved in a circular path about one of its ends with angular speed $\omega$. Derive the expression for the potential difference across the ...
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CBSE
#3 Class 12 Physics Electromagnetic Induction 2020 Mcq 1M
The mutual inductance, when the magnetic flux changes by $5 \times 10^{-2}$ Wb and current changes by 0.01 A, is
A. 0.2 H
B. 2.5 H
C. 5 H
D. 10 H
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CBSE
#4 Class 12 Physics Magnetism and Matter 2023 Long 5M
Explain the domain theory of ferromagnetic substances. Also write down its properties.
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CBSE
#5 Class 12 Physics Magnetism and Matter 2023 Short 3M
An iron rod of cross-sectional area $0.5$ cm$^2$ is subjected to a magnetising field of 1200 A·m$^{-1}$. If susceptibility of iron is 599, calculate: (1) $\mu$ (permeability), (2) $B$ (magnetic flux density), (3) $\Ph...
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CBSE
#6 Class 12 Physics Magnetism and Matter 2022 Short 3M
The permeability of a metal is measured to be $0.12$ T·A$^{-1}$·m. Find its relative permeability $\mu_r$ and susceptibility $\chi_m$.
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CBSE
#7 Class 12 Physics Magnetism and Matter 2021 Short 2M
Calculate the work done in rotating a bar magnet of magnetic moment 3 J·T$^{-1}$ through an angle of 60° from its position along a magnetic field of strength $0.34 \times 10^{-4}$ T.
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CBSE
#8 Class 12 Physics Magnetism and Matter 2020 Short 3M
A bar magnet of length 0.1 m has a pole strength of 50 A·m. Calculate the magnetic field at a distance of 0.2 m from its centre on: (i) its axial line, (ii) its equatorial line.
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CBSE
#9 Class 12 Physics Magnetism and Matter 2022 Short 2M
A bar magnet of length $L$ and magnetic dipole moment $M$ is bent in the form of an arc subtending an angle of 60° at its centre. What will be the new magnetic dipole moment?
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CBSE
#10 Class 12 Physics Magnetism and Matter 2021 Short 3M
A current of 7.0 A flows in a plane circular coil of radius 10 cm having 100 turns placed in a uniform magnetic field of 0.2 Wb·m$^{-2}$. What orientations correspond to (1) stable equilibrium and (2) unstable equilib...
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CBSE
#11 Class 12 Physics Magnetism and Matter 2022 Short 3M
Two identical magnetic dipoles of magnetic moment 1.0 A·m$^2$ each are placed at a separation of 2 m with their axes perpendicular to each other. Find the resultant magnetic field at the point mid-way between the dipo...
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CBSE
#12 Class 12 Physics Magnetism and Matter 2021 Short 2M
A bar magnet of magnetic moment 6.4 A·m$^2$ is placed in a uniform magnetic field of 0.4 T. What is the torque acting on the magnet when its axis makes an angle of 60° with the magnetic field?
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CBSE
#13 Class 12 Physics Magnetism and Matter 2020 Short 5M
Derive an expression for the magnetic field due to a magnetic dipole in the broadside-on (equatorial) position at a distance $r$ from its centre. The length of the dipole is $2l$ and its magnetic moment is $M$.
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CBSE
#14 Class 12 Physics Magnetism and Matter 2022 Short 5M
Derive an expression for the magnetic field intensity at a point on the axial line of a bar magnet. What is the direction of the field?
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CBSE
#15 Class 12 Physics Magnetism and Matter 2022 Long 5M
Draw the magnetic field lines distinguishing between diamagnetic and paramagnetic materials. Give a simple explanation to account for the difference in their magnetic behaviour.
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CBSE
#16 Class 12 Physics Magnetism and Matter 2020 Short 2M
State Gauss's law of magnetism. What are its important consequences?
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CBSE
#17 Class 12 Physics Magnetism and Matter 2008 Short 2M
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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CBSE
#18 Class 12 Physics Magnetism and Matter 2019 Short 2M
Define magnetic dipole and magnetic dipole moment. What are their units?
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CBSE
#19 Class 12 Physics Magnetism and Matter 2007 Short 2M
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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CBSE
#20 Class 12 Physics Magnetism and Matter 2021 Short 3M
Derive the relation between relative magnetic permeability $\mu_r$ and magnetic susceptibility $\chi_m$.
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