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Moving Charges and Magnetism

CBSE Class 12 · Physics · 34 past questions

  1. Q1 2026
    A charged particle +q in an electric field $\vec{E}$ experiences a force in the direction of the electric…
  2. Q2 2026
    A long straight wire of circular cross-section (radius a) carries a steady current I. The current is…
  3. Q3 2026
    A wire of length L is bent round into (i) a square coil having N turns and (ii) a circular coil having N…
  4. Q4 2026
    A galvanometer is used to detect or/and measure small currents in an electrical circuit. It essentially works…
  5. Q5 2026
    A straight long wire lying along y-axis, carries a current of 1 A along –y direction. The magnetic field due…
  6. Q6 2026
    A galvanometer of resistance 27 $\Omega$ is converted into an ammeter of range (0 – 10 mA) using a resistance…
  7. Q7 2026
    Derive an expression for the magnetic field $\vec{B}$, due to a circular coil of N turns, each of radius r…
  8. Q8 2025
    A bar magnet is initially at right angles to a uniform magnetic field. The magnet is rotated till the torque…
  9. Q9 2025
    A long straight wire is held vertically and carries a steady current in upward direction. The shape of…
  10. Q10 2025
    (with a figure)
  11. Q11 2025
    A 1 cm straight segment of a conductor carrying 1 A current in $x$ direction lies symmetrically at origin of…
  12. Q12 2025
    The magnetic field due to a small magnetic dipole of dipole moment ‘M’ at a distance ‘r’ from the centre…
  13. Q13 2025
    A 1 cm segment of a wire lying along x-axis carries current of 0.5 A along +x direction. A magnetic field…
  14. Q14 2024
    A 2.0 cm segment of wire, carrying 5.0 A current in positive y-direction lies along y-axis, as shown in the… (with a figure)
  15. Q15 2024
    A circular loop of wire, carrying a current 'I' is lying in xy-plane with its centre coinciding with the…
  16. Q16 2024
    A current carrying circular loop of magnetic moment $\vec{M}$ is suspended in a vertical plane in an external…
  17. Q17 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  18. Q18 2024
    A loop carrying a current I clockwise is placed in x – y plane, in a uniform magnetic field directed along…
  19. Q19 2024
    A 10 cm long wire lies along y-axis. It carries a current of 1.0 A in positive y-direction. A magnetic field…
  20. Q20 2024
    A galvanometer of resistance G $\Omega$ is converted into an ammeter of range 0 to I A. If the current…
  21. Q21 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  22. Q22 2024
    A proton with kinetic energy $1.3384 \times 10^{-14}$ J moving horizontally from north to south, enters a…
  23. Q23 2024
    A wire of length 4·4 m is bent round in the shape of a circular loop and carries a current of 1·0 A. The…
  24. Q24 2024
    Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  25. Q25 2024
  26. Q26 2023
    Beams of electrons and protons move parallel to each other in the same direction. They
  27. Q27 2023
    A long straight wire of radius 'a' carries a steady current 'I'. The current is uniformly distributed across…
  28. Q28 2023
    Assertion (A) : Diamagnetic substances exhibit magnetism.…
  29. Q29 2023
    Which of the following graphs correctly represents the variation of the magnitude of the magnetic field… (with a figure)
  30. Q30 2023
    A particle of mass m and charge q moving with a uniform velocity…
  31. Q31 2023
    Questions number 16 to 18 are Assertion (A) and Reason (R) type questions. Two statements are given — one…
  32. Q32 2023
    A wire of length $l$ is in the form of a circular loop A of one turn. This loop is reshaped into loop B of…
  33. Q33 2023
    An alpha particle is projected with velocity $\vec{v} = (3{\cdot}0 \times 10^{5}\ \text{m/s})\,\hat{i}$ into…
  34. Q34 2023