Magnetic Field Intensity Due to Magnetic Dipole

If the distance between two small bar magnets(treat as short dipole) is increased by $2\%$ Then force between them will decrease by

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

What will be magnitude of net magnetic field as shown in figure at point $P$. (Magnetic moment of small magnets are $M$ and $\frac{4M}{3\sqrt{3}}$ respectively)

Given that $\left(\frac{{\mu }_0}{4\pi }\frac{M}{R^3}=B_0\right)$

Two identical dipoles each of magnetic moment $1.0 \mathrm{A}-{\mathrm{m}}^2$ are placed at a separation of $2 \mathrm{m}$ with their axes perpendicular to each other. What is the magnetic field at a point midway between the dipoles?

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

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 $3 \mathrm{cm}$ and magnetic moment $0.6 \mathrm{A} {\mathrm{m}}^2$ is given. Find the value of magnetic induction on its axis at a distance of $75 \mathrm{cm}$ from its centre.

What is the value of magnetic induction due to a short bar magnet at a distance of $10 \mathrm{cm}$ from the centre of the magnet on its axis? Given that its magnetic moment is $0.48 \mathrm{J} {\mathrm{T}}^{-1}$.

What is the relationship between magnetic field at axial position (represented by ${\mathrm{B}}_{\mathrm{A}}$) and magnetic field at equatorial position (represented by ${\mathrm{B}}_{\mathrm{E}}$) due to a bar magnet?

Two small bar magnets of length $\text{1 cm}$ each have magnetic moments $1.20 \mathrm{A }{\mathrm{m}}^2$ and $1.00 \mathrm{A} {\mathrm{m}}^2$ respectively. They are placed on a horizontal table parallel to each other with their $\mathit{\text{N}}$ poles pointing towards the south. They also have the same magnetic equator and separation between them is $20.0 \mathrm{cm}$. What will be the value of the resultant horizontal magnetic induction at the mid-point $\text{O}$ of the line joining their centres? (Horizontal component of earth's magnetic induction is $3.6\times {10}^{-5} \mathrm{Wb} {\mathrm{m}}^{-2}$ )

Give the magnitude of the magnetic field produced by a short bar magnet at a distance of $10 \mathrm{cm}$ from the centre of the magnet on the axis, if it has magnetic dipole moment of $0.48 \mathrm{J} {\mathrm{T}}^{-1}$.

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

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 -

A point charge is moving in clockwise direction in a circle with constant speed. Consider the magnetic field produced by the charge at $\mathrm{a}$ point $\mathrm{P}$ (not centre of the circle) on the axis of the circle.