Definition

1. Noun:
   • An electromagnetic device: A solenoid is a physical component consisting of a coil of insulated wire wound in a helix, typically around a movable iron or steel core. It functions as an electromagnet when an electric current passes through the wire, generating a controlled magnetic field.

Usage and Examples

• Noun:
  • The engineer replaced the faulty solenoid in the valve assembly.
  • When activated, the solenoid creates a magnetic force that moves the metal plunger.
  • A simple doorbell uses a solenoid to strike the bell.

Advanced Usage and Technical Context

• Electromechanical Actuator: In engineering, a solenoid's primary function is to convert electrical energy into linear mechanical motion. The magnetic field pulls the core into the center of the coil.
  • The fuel injector is controlled by a high-speed solenoid.
• Inductor Component: In electrical circuits, a solenoid can be analyzed as an inductor, storing energy in its magnetic field.
  • The circuit's inductance is largely determined by the solenoid.

Variants and Related Words

• Solenoidal (adjective): Pertaining to or having the form or properties of a solenoid.
  • The solenoidal field was measured around the coil.
• Electromagnet: A broader term for a magnet created by electric current, often using a coil. A solenoid is a specific type of electromagnet designed to produce motion.

Synonyms

• Electromagnetic coil
• Actuator coil (in specific mechanical contexts)

Related Phrases and Compound Terms

• Solenoid valve: A common compound device where a solenoid controls the opening and closing of a fluid valve.
  • The irrigation system is automated with solenoid valves.
• Solenoid lock: A locking mechanism engaged or released by a solenoid.
  • The building uses electronic access with solenoid locks on all doors.

Noun

1. a coil of wire around an iron core; becomes a magnet when current passes through the coil