Find the stable equilibrium position of a magnet in a magnetic field.

Assuming theta = pi//2 as the zero-energy position of a magnet in a magnetic field, show that the potential energy of a magent can be written as u =- vec(B) . vec(m) . Hence find the stable equilibrium position of a magnet in a magnet in a magnetic field.

What are the conditions for stable and unstable equilibrium of a magnet suspended in a uniform magnetic field?

Find magnetic field at O.

Stable equilibrium of a magnetic dipole in a uniform magnetic field will be at orientation when:

A bar magnet of magnetic moment M is hung by a thin cotton thread in a uniform magnetic field B. Work done by the external agent to rotate the bar magnet from stable equilibrium position to 120° with the direction of magnetic field is (consider change in angular speed is zero)

Finding Magnetic Field

Two magnets of magnetic moments M and Msqrt3 are joined to form a cross(+) . The combination is suspended freely in a uniform magnetic field . At equilibrium position, the magnet of magnetic moment M makes an angle theta with the field, then theta is