Magnetic Field Due to a Bar Magnet

What is the difference between magnetic dipole moment and magnetic field ?

Magnetic field at any point due to a short magnetic dipole derivation.

Calculate electric field due to dipole of dipole momentum P at distance r and angle θ.

Magnetic field due to a magnetic dipole at any point due to a dipole moment.

What is magnetic field at a general point due to short magnetic dipole?

The ratio of magnitude of magnetic field at a distance $2 d$ from short bar magnet in longitudinal direction to the field at distance $d$ in transverse direction is

A bar magnet of length $3 \mathrm{cm}$ has a point $A$ and $B$ along axis at a distance of $24 \mathrm{cm}$ and $48 \mathrm{cm}$ on the opposite ends. Ratio of magnetic fields at these points will be

If the earth's magnetic field has a magnitude $3.4\times {10}^{-5} \mathrm{T}$ at the magnetic equator of the earth, what would be its value at the earth's geomagnetic poles?

What will be the ratio of magnetic fields at the points on axis and equator equidistant from centre of bar magnet?

Consider two identical short bar magnets placed such that their axes are perpendicular to each other in a horizontal plane. If both the magnets have same magnetic moment $M$ and the separation between them is $2d$, then what is the magnetic induction at a point midway between them?

Cotyledons are also called-

The magnitude of the equatorial magnetic field due to a bar magnet of length $2\mathrm{ }\mathrm{c}\mathrm{m}$ at a distance of $1\mathrm{ }\mathrm{m}$ from its mid-point is (magnetic moment of the bar magnet is $0.60$ A ${\mathrm{m}}^2$ )

Two identical bar magnets are fixed with their centres at a distance $d$ apart. A stationary charge $Q$ is placed at $P$ in between the gap of the two magnets at a distance $D$ from the centre $O$ as shown in the figure



The force on the charge $Q$ is

In which direction, the magnetic field on the axis at a distance z from the centre of the bar magnet would be?

A short bar magnet has a length $2l$ and a magnetic moment $10 \mathrm{A} {\mathrm{m}}^2$. Find the magnetic field at a distance of $z=0.1 \mathrm{m}$ from its centre on the axial line. Here, $l$ is negligible as compared to $z$.

A short bar magnet has a length $2l$ and a magnetic moment $10A{m}^2$ . Find the magnetic field at a distance of z = 0.1 m from its centre on the axial line. Here, $l$ is negligible as compared to z.

If r be the distance of a point on the axis of a bar magnet from its centre, the magnetic field at this point is proportional to

${\mathrm{O}}^{++},\mathrm{ }{\mathrm{C}}^{+},\mathrm{ }{\mathrm{H}\mathrm{e}}^{++}$ and ${\mathrm{H}}^{+}$ ions are projected on the photographic plate with same velocity in a mass spectrograph. Which one will strike farthest ?

A particle of charge $q=4\mathrm{\mu }\mathrm{C}$ and mass $m=10\mathrm{ }\mathrm{\mu g}$ starts moving from the origin under the action of an electric field $\overrightarrow{\mathrm{E}}=4 N C^{-1} \hat{\mathrm{i}}$ and magnetic field $\overrightarrow{\mathrm{B}}= \left(0.2 \mathrm{T}\right) \hat{\mathrm{k}}$ . Its velocity at $\left(x, 3, 0\right)$ is $\left(4 \hat{\mathrm{i}}+3 \hat{j}\right)$ . The value of $x$ is -

Two circular coils made of similar wires but of radius $20\mathrm{ }\mathrm{c}\mathrm{m}$ and $40\mathrm{ }\mathrm{c}\mathrm{m}$ are connected in parallel. The ratio of magnetic fields at their centre is -