Which statement correctly describes mag stick relays when de-energized?

Which statement correctly describes mag stick relays when de-energized?

• A. Hold last position energized
• B. Return to rest state
• C. Oscillate
• D. Move to center

Answer: (A)

Mag-stick relays are designed as latching devices. When you drive the coil with a pulse in one direction, the armature moves to a particular position, and once the energizing pulse ends, the mechanism uses a magnet to hold that position. Because there’s no continuous force returning it, the relay stays in the last position even after power is removed. That’s why the statement that it holds its last position when de-energized is correct. It doesn’t automatically return to a rest state, it doesn’t oscillate on its own, and it doesn’t move to a centered position just because power is removed. The key behavior is memory: the relay “remembers” the last state without continuous power.

Mag-stick relays are designed as latching devices. When you drive the coil with a pulse in one direction, the armature moves to a particular position, and once the energizing pulse ends, the mechanism uses a magnet to hold that position. Because there’s no continuous force returning it, the relay stays in the last position even after power is removed. That’s why the statement that it holds its last position when de-energized is correct.

It doesn’t automatically return to a rest state, it doesn’t oscillate on its own, and it doesn’t move to a centered position just because power is removed. The key behavior is memory: the relay “remembers” the last state without continuous power.