Circular Coil on Base – Demonstration of Magnetic Fields

The Circular Coil on Base is a robust and highly visual teaching apparatus designed to clearly demonstrate magnetic fields produced by an electric current. Mounted securely on a solid base, the circular coil is constructed from 94 turns of 1 mm diameter copper wire, providing a strong and well‑defined magnetic field when connected to a suitable power supply.

A clear plastic sheet above the coil allows iron filings to be scattered safely and evenly. When a current flows through the coil, the filings align to reveal the magnetic field lines, making abstract electromagnetic concepts easy to observe and understand. This makes the apparatus ideal for both teacher demonstrations and student investigations.

For greater versatility, the circular coil can also be used alongside a compass, magnetic field sensor, or datalogger, allowing both qualitative observation and quantitative measurement. For the strongest and clearest effect, a high‑current laboratory power supply (5 A or higher) is recommended.

Key Features

• Demonstrates magnetic fields generated by electric currents
• Circular coil with 94 turns of 1 mm diameter copper wire
• Mounted on a stable base for classroom use
• Clear plastic sheet for use with iron filings
• Visualises magnetic field lines clearly and effectively
• Compatible with a compass, magnetic field sensor, or datalogger
• Requires a high‑current laboratory power supply (≥ 5 A) for best results

Ideal for School Physics & Science Lessons

Perfect for KS3, GCSE, and A‑Level physics lessons, the Circular Coil on Base helps students develop a clear understanding of electromagnetism and the relationship between electricity and magnetism. It is particularly useful for:

• Visualising magnetic fields around a current‑carrying conductor
• Exploring how current strength affects magnetic field patterns
• Introducing electromagnetic theory in a practical context
• Comparing observations from iron filings and compasses
• Supporting data‑based investigations using sensors or dataloggers

Clear, engaging, and highly effective, this Circular Coil on Base is an essential teaching resource for demonstrating core physics principles and encouraging hands‑on learning in school science laboratories.