Moving Charges and Magnetism

Bihar Board Class 12 · Physics · 32 past questions

1. Q1 2026 Set A2022 Set I2019

   What is Lorentz force?

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2. Q2 2026 Set A

   If a charged particle of mass $m$ and charge $q$ enters a uniform magnetic field $B$ at an angle $\theta$ in…

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3. Q3 2026 Set A

   The magnetic field lines inside a current-carrying solenoid are

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4. Q4 2025 Set D

   When an ammmeter is shunted then its measurement limit

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5. Q5 2025 Set D

   Dimensional formula of permeability is

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6. Q6 2025 Set D

   If the number of turns is increased in any moving coil galvanometer, then its sensitivity

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7. Q7 2025 Set D

   The specific charge of electron is

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8. Q8 2025 Set D

   The direction of magnetic field inside a current-carrying solenoid is

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9. Q9 2024 Set A

   Which one of the following is not a unit of magnetic field ?

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10. Q10 2024 Set A

    An electron of charge $e$ moves parallel to uniform lines of force in magnetic field $B$ with velocity $v$.…

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11. Q11 2024 Set A

    The nature of electron beams moving with uniform velocity in the same direction will be

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12. Q12 2024 Set A

    The value of torque ($\vec{\tau}$) experienced by current loop of magnetic moment ($\vec{m}$) placed in…

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13. Q13 2024 Set A

    The value of current obtained in a moving coil galvanometer is proportional to

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14. Q14 2024 Set A

    A galvanometer is converted into ammeter by adding

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15. Q15 2024 Set A

    The magnetic field produced at the centre of current carrying circular coil is

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16. Q16 2023 Set F

    If any ammeter is shunted, then the total resistance of the circuit

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17. Q17 2023 Set F

    The radius of a circular current loop is made double and the current is made half. The magnetic moment of the…

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18. Q18 2023 Set F

    The formula for magnetic energy density for a solenoid is

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19. Q19 2023 Set F2019

    In a vertically upwards magnetic field $\vec B$, a positively charged particle is projected horizonally… (with a figure)

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20. Q20 2022 Set I

    Which of the following is the correct vector form of the equation of Biot-Savart law?

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21. Q21 2022 Set I

    Electromagnetic moment of current carrying coil is

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22. Q22 2022 Set I

    Which of the following is correct for Lorentz force ?

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23. Q23 2022 Set I

    Electromagnetic moment of current carrying coil is

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24. Q24 2022 Set I

    Which of the following is correct for galvanometer constant?

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25. Q25 2021 Set A

    Magnetic field of 5 tesla is equal to

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26. Q26 2021 Set A

    Expression of force on a charge $q$ moving with velocity $\vec{V}$ in a magnetic field $\vec{B}$ is

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27. Q27 2019

    The torque $(\vec{\tau})$ experienced by a current-loop of magnetic moment $(\vec{M})$ placed in magnetic…

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28. Q28 2019

    What is Shunt? Write its two uses.

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29. Q29 2018

    A charge 'q' moves in a region where electric field 'E' and magnetic field 'B' both exist, then force on it…

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30. Q30 2018

    A circular coil of radius R carries a current I. The magnetic field at its center is B. At what distance from…

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31. Q31 2018

    An electron moving through a field remains undeflected. It is possible that there is no magnetic field.…

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32. Q32 2017

    Show that a tangent galvanometer measures that current with maximum accuracy which produced $45^0$ deflection.

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