The Oersted's Law Apparatus offers a practical method for demonstrating how electric current generates a magnetic field. Named after Hans Christian Ørsted, who first discovered this phenomenon, this apparatus shows the deflection of a compass needle caused by current in a nearby conductor.
Its aluminium frame supports a sensitive 15cm magnetic needle mounted on agate bearings for smooth, unhindered movement. With options to run current above or below the needle, students can investigate polarity and magnetic field orientation.
Educational Benefits
Demonstrates the magnetic effects of current in a wire
Highlights Ørsted’s foundational contribution to electromagnetism
Promotes visual understanding of current direction and magnetic polarity
Enhances experimental learning with simple setup
Classroom Ideas
Combine with a variable power supply to examine deflection strength
Observe compass needle behaviour with current in different directions
Link to experiments with solenoids and electromagnets
Compare results with Ampere’s apparatus for field mapping
Specifications
Permanent magnetic needle: 15cm
Mounted in an aluminium frame with agate bearings
Binding posts included for current supply
Rheostat recommended: SER1010474
Suitable for students aged 13+