Bar magnet

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

If $r$ is the orbital radius and $v$ is the orbital velocity of an electron in a hydrogen atom, then its magnetic dipole moment is

What happens pole strength?

Why unit of pole strength is ampere meter?

What is Coulomb's law in magnetism?

Explain how to differentiate between a magnet and an iron rod when they both look identical.

What is unit Pole?

The magnetic field lines due to a bar magnet are correctly shown in

Is it possible to isolate the poles of a magnet?

Which of the field pattern given below is valid for electric field as well as for magnetic field?

Which of the following is/are the properties of magnetic field lines?

The best material to make permanent magnets is

Assertion : Magnetic flux enclosed with a closed surface is always zero

Reason : Gauss law applies in the case of electric field and magnetic field both

Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole $\overrightarrow{m}$. Which configuration has highest net magnetic dipole moment?

(a)(b)(C)(d)

A steel wire of length I has magnetic moment M. It is bent into a semi-circle. Now its magnetic moment is

 The surest test for magnetism is a test for repulsion.

Inside a bar magnet, the magnetic field lines

The net magnetic flux through any closed surface, kept in a magnetic field is

$\oint \overrightarrow{B}·d\overrightarrow{s}=0$ equation is not according to the following

$A$ 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