Quick Answer: The Electric Bell Demonstration Model shows how an electric bell works: current energises an electromagnet, which attracts an armature and makes and breaks contact repeatedly to ring the bell.
Last updated: October 2026
Key Features
Shows electromagnet, armature, hammer, gong and contact screw action
Demonstrates the magnetic effect of electric current
Shows repeated make-and-break circuit action
Connects circuit theory with an everyday electromechanical device
About This Product
Connected to the recommended low-voltage source, the model lets students watch current energise the electromagnet and the armature move towards it to operate the hammer. Teachers then explain how contact is broken and restored over and over to give continuous ringing. Power is switched off and the leads disconnected after the demonstration.
Frequently Asked Questions
Q1. Why does the bell keep ringing? Contact in the circuit is broken and restored repeatedly as the armature moves, so the make-and-break cycle continues and the bell rings for as long as current is supplied.
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