False
permanent magnets can but electromagnets need a running current A+
Compared to the external environment, a greenhouse will retain heat.
Answer: Pure water has the best capacity for heat of any material known to man, so any impurity must reduce its ability.
Permanent storage refers to data storage solutions that retain information indefinitely, even when not powered, such as hard drives, SSDs, and cloud storage. In contrast, temporal storage, also known as volatile storage, holds data temporarily and loses it when the power is turned off, like RAM. While permanent storage is essential for long-term data retention, temporal storage is crucial for fast access to data that the system is currently using.
Not exactly. All pieces of the magnet retain their ferrous properties, but if they were (for example) dropped, then the shock of the fall could potentially make them lose a bit of magnetism. Extreme temperature changes and high power electric discharges could also decrease the power of the magnet.
to hold onto a characteristic through time
The temperature at which a magnetic material can retain permanent magnetization is called the Curie temperature (or Curie point). Above this temperature, the material loses its permanent magnetic properties and becomes paramagnetic, as the thermal energy disrupts the alignment of magnetic domains. Below the Curie temperature, the material can maintain a stable magnetization.
Curie temperature.
ferromagnetic material, such as iron, nickel, or cobalt. These materials can retain their magnetization even after the external magnetic field is removed.
the process of converting iron to a permanent magnet is called magnetization. As iron is a ferro magnetic material it is magnetized by applying strong magnetic field across it , this makes the alignment of all the magnetic dipoles present in iron in the same direction .Even after the external magnetic field is removed they retain their arrangement , thus it becomes a permanent magnet
The process by which a magnetic material becomes magnetized when placed near a magnet is called "magnetization." During this process, the magnetic domains within the material align in the direction of the external magnetic field, resulting in the material exhibiting its own magnetic properties. This effect is temporary for most materials, but some can retain magnetization, making them permanent magnets.
The ability of a material to retain its magnetism is known as magnetic hysteresis. It refers to the phenomenon where a material retains some magnetization even after the external magnetizing field is removed.
Materials like iron, nickel, and cobalt have high retentivity, which means they can retain a significant amount of magnetization even after the magnetic field is removed. This property makes them useful in applications such as permanent magnets and magnetic storage devices.
Antimony is not magnetic in standard conditions because it is a diamagnetic material, meaning it creates a weak repulsive force in the presence of a magnetic field. It does not retain magnetization when the external magnetic field is removed.
exhibits strong magnetic properties due to the alignment of magnetic moments in its structure. Ferromagnetic materials can be easily magnetized and retain their magnetization after the magnetic field is removed.
A ferromagnetic material has a high magnetic permeability and can retain a strong magnetic field once magnetized. It exhibits spontaneous magnetization and can be easily magnetized and demagnetized. Ferromagnetic materials include iron, nickel, and cobalt.
No, a refrigerator magnet is not a permanent magnet. Refrigerator magnets are usually made of soft magnetic materials that become temporarily magnetized when in the presence of a magnetic field, allowing them to stick to the refrigerator. Permanent magnets, on the other hand, retain their magnetization over time without the need for an external magnetic field.
An AC supply is not used to magnetize a bar of steel because the alternating current continuously changes direction, causing the magnetic field to fluctuate. This results in the magnetization being ineffective, as the steel would not retain a stable magnetic orientation. For permanent magnetization, a direct current (DC) supply is preferred, as it creates a steady magnetic field that can align the domains in the steel and maintain the magnetization.