Definition

Noun: A static magnet is a permanent magnet that maintains its magnetic field without requiring an external power source or an electric current. It retains its magnetism after being removed from a magnetic field or after the magnetizing force is removed.

Usage

The term "static magnet" is used to distinguish permanent magnets from electromagnets. It describes an object with a persistent magnetic field. * A common refrigerator door seal uses a static magnet to stay closed. * The speaker in a headphone often contains a static magnet to help convert electrical signals into sound.

Advanced Usage

• In engineering and physics, "static magnet" can refer to the fixed, non-varying magnetic field source in a system, as opposed to a time-varying or alternating field.
  • The MRI machine uses both powerful static magnets and gradient coils to create images.

Variants and Related Words

• Permanent Magnet: This is the most common and direct synonym for "static magnet."
• Ferromagnet: A material (like iron, cobalt, or nickel) that can exhibit strong magnetic properties and be made into a static magnet.
• Lodestone: A naturally occurring mineral (magnetite) that is a static magnet.

Synonyms

• Permanent magnet
• Hard magnet (in materials science, indicating it is hard to demagnetize)

Antonyms

• Electromagnet (a magnet whose magnetic field is produced by an electric current)
• Temporary magnet (a material that acts as a magnet only while in a strong magnetic field)

Related Phrases and Concepts

• Magnetic Field: The invisible area of magnetic force surrounding a static magnet.
• Magnetic Pole: One of the two ends (North or South) of a static magnet where the magnetic force is strongest.
• Remanence or Retentivity: The capacity of a material to retain magnetization, which is the key property of a static magnet.

Noun

1. a magnet that retains its magnetism after being removed from a magnetic field