Magnetism and Matter

Bihar Board Class 12 · Physics · 30 past questions

1. Q1 2026 Set A2023 Set F

   Nickel is

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2. Q2 2026 Set A

   If a bar magnet is cut into two equal pieces transverse to its length, then each piece will

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3. Q3 2026 Set A

   A circular loop radius $R$ carries a current $I$. Its magnetic dipole moment is

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4. Q4 2026 Set A2022 Set I

   Relative permeability is equal to

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5. Q5 2025 Set D

   At neutral points

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6. Q6 2025 Set D

   The relative permeability ($\mu_r$) of ferromagnetic substance is

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7. Q7 2024 Set A

   On dividing any magnet of magnetic moment ( $M$ ) parallel to its length into $n$ equal pieces, the moment of…

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8. Q8 2024 Set A

   Which of the following shows hysteresis ?

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9. Q9 2024 Set A

   The value of magnetic potential at a distance $r$ from a pole strength $m$ is

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10. Q10 2024 Set A

    The energy density of magnetic field $\vec{B}$ is

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11. Q11 2023 Set F

    The angle between magnetic meridian and geographical meridian is called

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12. Q12 2023 Set F

    Magnetic moment of the earth is

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13. Q13 2022 Set I

    Work done in the deflection of a magnet in a uniform magnetic field is

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14. Q14 2022 Set I

    Intensity of a magnetising field ( $H$ ) is equal to

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15. Q15 2022 Set I

    Which of the following is correct for short magnet ?

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16. Q16 2022 Set I

    Expression for the time-period of a magnet oscillating in a uniform magnetic field is

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17. Q17 2022 Set I

    Which of the following relations is correct for earth's magnetic field ($B_H$) and frequency of magnetic…

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18. Q18 2022 Set I

    Which of the following is correct for tangent law ?

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19. Q19 2022 Set I

    Which of the following relations is correct?

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20. Q20 2022 Set I

    The value of $\vec{B}$ on the surface of the earth is

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21. Q21 2021 Set A

    The value of angle of dip at magnetic pole of the earth is

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22. Q22 2021 Set A

    The value of magnetic susceptibility of vacuum is

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23. Q23 2021 Set A

    Which of the following relations is correct for permeability ?

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24. Q24 2021 Set A

    If $B$ is earth's magnetic field in magnetic meridian, $\delta$ is angle of dip, $B_H$ is horizontal…

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25. Q25 2019

    The susceptibility of paramagnetic substance is

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26. Q26 2019

    In earth's magnetic field $B_H$, if the frequency of oscillation of a magnetic needle is n, then

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27. Q27 2019

    The value of angle of dip at the earth's magnetic pole is

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28. Q28 2018

    Magnetic dipole moment is a vector quantity directed from…

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29. Q29 2017

    Permeability $\mu$ of a ferromagnetic substance-

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30. Q30 2017

    Write expression for magnetic fields $\vec{B}$ on axis and equator of a short bar magnet.

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