Magnet as a Dipole

The magnetic moment of a circular orbit of radius 'r' carrying a charge 'q' and rotating with velocity v is given by

How do you find the magnetic dipole moment?

How do you determine magnetic moment experimentally?

Is a magnet a magnetic dipole?

Is a magnet a magnetic dipole?

$A$ thin bar magnet oscillates with a time period $T.$ If it is cut into two equal pieces along its axis, time period of oscillation of each piece is

The pole strength of poles of a bar magnet of effective length $0.1 \mathrm{m}$ is $40 \mathrm{A}-\mathrm{m}$. What is its magnetic moment in $\mathrm{A}-{\mathrm{m}}^2$?

The pole strength of poles of a bar magnet of effective length $0.1 \mathrm{m}$ is $40 \mathrm{A}-\mathrm{m}$. What is it's magnetic moment in $\mathrm{A}-{\mathrm{m}}^2$?

$A$ thin bar magnet oscillates with a time period $T.$ If it is cut into two equal pieces along its axis, time period of oscillation of each piece is

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

The magnetic moment of a bar magnet is $3.6\times {10}^{-3}\mathrm{ }\mathrm{A} {\mathrm{m}}^2$. Its pole strength is $120 \mathrm{mA} \mathrm{m}$. Its magnetic length is

The areas of cross-sections of three magnets of same length are $A, 2A$ and $6A$ respectively. The ratio of their magnetic moments 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?

A bar magnet of length $l$ and pole strength $m$ is placed at a right angle to another bar magnet of the same length and same pole strength, such that the $\mathrm{N}$ pole of one magnet touching $\mathrm{S}$ pole of the other. Now, find the magnitude of the magnetic moment of this system:

Calculate the magnetic moment of a circular coil of radius $10 \mathrm{cm}$ having $100$ turns, if it carries a current of $3.2 \mathrm{A}$.  

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