c. easily loses its magnetism. It keeps its magnetism, so you can always find your shopping list! Two types of permanent magnet.

Retentivity is the ability of a material to retain magnetic character even after the action of the magnetizing force has stopped or the magnet has been removed. To change, i.e.
The magnet on a fridge magnet is a permanent magnet: it doesn’t lose its magnetic properties.

_____ Formed by placing a piece of iron inside a current carrying coil of wire. Some magnetic materials retain magnetism longer than others. b. cannot be destroyed. A permanent magnet has a permanent orientation of the magnetic moments in a specific vectorially additive direction depending on small crystal domains. A permanent magnet keeps its magnetic properties for a long time.

A fridge magnet is a permanent magnet. Number of poles of a horseshoe magnet 6. _____ A simple instrument designed to detect current using an electromagnet. be demagnetized, the magnetic moments have to be randomized by either an external magnetic field or excess heat/melting or …

Type of magnet that keeps its magnetic properties for a long time 4. The material that is used keeps part of its magnetization even after the external magnetic field is turned off.

While all known materials exert some sort of magnetic force, it is so small in most materials that it is not readily noticeable. ... Another type of magnet is an electromagnet.

Above is a bar magnet, below is a horseshoe magnet.

This is because these materials have a high retentivity and coercivity.

Scientists use qualities such as coercivity and retentivity to measure how well a magnetic material keeps its …

Magnetic poles that attract one another 8.

A lodestone is a natural permanent magnet. Over several years, the vibrations from changes in temperature eventually randomize the magnetic orientations of its domains.

_____ Type of magnet that keeps its magnetic properties for a long time. Type of force that becomes stronger as two magnets are brought closer together 3. Magnetic poles that repel one another Down 1.

A magnet is a material that can exert a noticeable force on other materials without actually contacting them. d. has two north poles. A temporary magnet a. keeps its magnetism for a long time. Group of aligned atoms that behaves like a magnet 5. A temporary magnet acts as a magnet only as long as it is in the magnetic field of a permanent magnet. This force is known as a magnetic force and may either attract or repel. _____ Groups of aligned atoms in a magnet.
Magnetism, at its root, arises from two sources: Electric current. ; Spin magnetic moments of elementary particles.

Figure 4: The north pole of a magnet points to the Earth's magnetic north pole.