CBSE 2025 · Region 2 · Set 1 · Q4 · 1 mark
The magnetic field due to a small magnetic dipole of dipole moment' M 'at a distance'$\displaystyle \mathrm{r}$'from the centre along the axis of the dipole is given by
Official answer
From CBSE’s own marking scheme for this paper.
(A)
$\displaystyle \frac{\mu_{0}}{4 \pi} \times \frac{2 \mathrm{M}}{\mathrm{r}^{3}}$
Magnetism and MatterThe Bar MagnetRemembermcqmedium
More from Magnetism and Matter
- Assertion: When a bar of copper is placed in an external magnetic field, the field lines get concentrated…2023 · asked 3×
- Assertion: When a ferromagnetic substance is heated to high temperature it becomes paramagnetic in nature.…2026 · asked 3×
- Assertion: All atoms have a net magnetic moment. Reason (R): A current loop does not always behave as a…2026 · asked 3×
- A piece of a diamagnetic material, free to move when placed in a uniform magnetic field:2025 · asked 3×
- Assertion: Diamagnetic substances exhibit magnetism. Reason (R): Diamagnetic materials do not have permanent…2023 · asked 3×
- A diamagnetic substance is brought near the north or south pole of a bar magnet. It will be:2023 · asked 3×
- The magnetic susceptibility for a diamagnetic material is2024 · asked 3×
- Which of the following has its permeability less than that of free space?2023 · asked 2×
CBSE Class 12 Physics past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.