Red Seal Electrician Practice
Wiring and componentsQuestion 79 of 1506

What is pull-in current?

  1. The minimum coil current needed to move the armature from its normal position
  2. The maximum current that the contacts can carry without damage
  3. The current at which the armature drops out of its pulled-in state again
  4. The current that the contacts draw from the supply when they close
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Correct answer: The minimum coil current needed to move the armature from its normal position

Below this value the relay will not reliably operate.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 5.1: Relay Construction

Practice wiring and components

Questions last reviewed: 18 October 2026