The question refers to the "following". In such circumstances would it be too much to expect that you make sure that there is something that is following?
Heating will do it.
A permanent magnet (in contrast to an electromagnet).
A permanent magnet may become unmagnetized because a shock it will have.
They are round. And they are magnetic. Without a specification for the magnet nothing more can be assumed.
An electromagnet (a coil around a soft iron core) will only be magnetic when current changes in the coil and so is not permanent.
Electromagnet. it is a piece of metal (usually iron) that is wrapped in copper wire. it is turned on by putting electricity through the copper wire. it then producces a magnetic field when electricity is run through it.
Permanent magnets do not lose their magnetic ability. Temporary magnets, however, gain magnetic properties when they are touched or moved by a permanent magnet. The properties of a temporary magnet dissipates over time after the permanent magnet is removed.
The magnetic domains are aligned
That's a "permanent" magnet.
permanent magnet .
There are two main types of magnet - Permanent and electromagnet. Electromagnets are usually in the form of a coil wound around an iron core. When current passes through the coil the core becomes magnetic. A permanent magnet is made of a material that naturally exhibits magnetic properties.
A permanent magnet (in contrast to an electromagnet).
(n.) a magnet that retains its magnetism after being removed from an external magnetic field
Temporary magnet: good example is an electromagnet. It maintains magnetic attraction only so long as an electric current surrounds it. Permanent magnet: most common. Example: bar magnet. Will maintain magnetic properties for quite a while, although they can be eventually demagnetized.
A temporary magnet is something that has been magnetized that won't stay a magnet for long, such as a paperclip that you have rubbed with a magnet. A Permanent magnet is usually a Lodestone that is found naturally or is manufactured by a company. Permanent magnets are always magnetic.
PermanentThere is no source of current in a compass, therefore the magnet is a permanent magnet.
no they can not.
Inertia. A system will not change it's properties until an external force is applied. Permanent magnets DO decrease in strength by being used as they are subjected to external magnetic fields that oppose them. How much a permanent magnet will be affected by the external field depends on it's Hysteresis loop characteristics.