How does a permanent magnetic switch store energy

Why do permanent magnets move upwards?

So, the fact that the ball moves upwards is compatible with the conservation of the energy. Permanent magnets do have potential energy, stored in their magnetic field. That energy can be compared to the potential energy of some compressed spring. See the picture below, representing the magnetic field lines of a magnetized sphere :

How to calculate energy stored in magnetic field due to permanent magnet?

Now let us start discussion about energy stored in the magnetic field due to permanent magnet. Total flux flowing through the magnet cross-sectional area A is φ. Then we can write that φ = B.A, where B is the flux density. Now this flux φ is of two types, (a) φ r this is remanent flux of the magnet and (b) φ d this is demagnetizing flux.

What if a permanent magnet uses an electromagnet instead of a magnet?

If a permanent magnet is replaced with an electromagnet, Griffith shows that the generator provides the extra energy. This suggests that for a permanent magnet, the energy is not drawn from the magnetic field (as the magnetic field would work if it were the case).

How does a permanent magnet work?

The magnet is wrapped with a coil that supplies the field intensity needed to magnetize the permanent magnet material. As current in the coil wrapping the magnet material is increased, the flux density in the magnetic material increases until the magnet saturates.

Do permanent magnets have potential energy?

Permanent magnets do have potential energy, stored in their magnetic field. That energy can be compared to the potential energy of some compressed spring. See the picture below, representing the magnetic field lines of a magnetized sphere : These lines are compressed inside the magnet.

How are permanent magnets made?

Permanent magnets are made by magnetizing ferromagnetic material, a process that normally requires a substantial energy input. It is true that their magnetized state is a method for storing potential energy. This energy can be converted into, for example, kinetic energy (when they attract objects), which usually dissipates to the surroundings.