🔍 Key Concepts

• Magnetic controllers and how their contacts open/close • Effect of mechanical vibration vs electrical problems on noise • How the air gap and magnet face condition affect coil pull-in

💭 Think About

• Which of these conditions would most likely cause a rapid mechanical chatter rather than a steady electrical hum? • If the electromagnet can’t pull the armature in firmly, what happens to the moving part and the contacts? • Which condition would prevent the magnet faces from seating tightly together, and what kind of sound would that make?

✅ Before You Answer

• Distinguish between electrical overload effects (heat, tripping) vs mechanical chatter (noise, vibration) • Consider how a larger-than-normal air gap or obstruction affects magnetic pull and armature motion • Think about whether dirt alone makes a loud buzzing or more of a weak, unreliable pull-in without pronounced chatter