Which term refers to an electromagnet device with a movable iron core used to actuate switches?

Which term refers to an electromagnet device with a movable iron core used to actuate switches?

• A. DPDT
• B. Micro Switch
• C. Relays
• D. Solenoids

Answer: (D)

A solenoid is an electromagnetic device that converts electrical energy into linear motion using a coil and a movable iron core (plunger). When current flows through the coil, a magnetic field is created and pulls the core toward it. That motion can be used to actuate a switch or valve, making the device an actuator as well as an electromagnet. This fits the description best because the defining feature is the movable iron core inside the coil that provides the actuation. While a relay also uses an electromagnet to operate a switch, the specific phrasing about a movable iron core inside the electromagnet points to a solenoid acting as the actuator.

A solenoid is an electromagnetic device that converts electrical energy into linear motion using a coil and a movable iron core (plunger). When current flows through the coil, a magnetic field is created and pulls the core toward it. That motion can be used to actuate a switch or valve, making the device an actuator as well as an electromagnet.

This fits the description best because the defining feature is the movable iron core inside the coil that provides the actuation. While a relay also uses an electromagnet to operate a switch, the specific phrasing about a movable iron core inside the electromagnet points to a solenoid acting as the actuator.