Definition

Noun: A magnetic dipole is the simplest type of magnetic source, consisting of two opposite and equal magnetic poles (north and south) separated by a very small distance. It is a fundamental concept used to model the magnetic properties of objects, from subatomic particles to planets.

Usage

The term magnetic dipole is used to describe the magnetic field pattern produced by a simple, small magnet or an equivalent current loop. It is a core concept in physics and engineering.

Examples

• A simple bar magnet is a classic example of a magnetic dipole.
• The Earth itself behaves approximately like a giant magnetic dipole.
• In atomic physics, an electron possesses an intrinsic magnetic dipole moment due to its spin.

Advanced Usage

• Magnetic Dipole Moment: This is a vector quantity that measures the strength and orientation of a magnetic dipole. It is a more precise way to characterize the source of the magnetic field.
  • The magnetic dipole moment of the coil determines the torque it experiences in an external field.

Variants and Related Words

• Dipole (n): A general term for any pair of equal and opposite charges or poles separated by a distance. A magnetic dipole is a specific type of dipole.
• Electric Dipole (n): The electrical analogue, consisting of two equal and opposite electric charges separated by a small distance.

Synonyms

• Magnetic doublet
• Simple magnet (in a fundamental modeling context)

Related Phrases and Concepts

• Dipole Field (n): The characteristic magnetic field pattern produced by a magnetic dipole, with field lines emerging from the north pole and entering the south pole.
  • The compass needle aligns itself with the local dipole field.
• Magnetic Monopole (n): A hypothetical, isolated magnetic charge (either north or south). Its non-existence is why magnetic dipoles are the fundamental magnetic sources.
  • Scientists have searched for, but never confirmed, the existence of a magnetic monopole.

Noun

1. a dipole with opposing magnetic poles