Clear Interchangeable Dial for Demonstration Meter Material_PVC and a six-turn thick coil

and a six-turn thick coil for hands-on Lenz's law and induction-heating work

and cervical spine across the same model for comprehensive head anatomy teaching

letting students watch the wire travel along the rail as roughly 3A of current crosses the magnetic field

routing a single input between two alternative output paths to introduce circuit-control and signal-selection logic

Clear Interchangeable Dial for Demonstration Meter Material_PVC and a six-turn thick coilUsed in laboratory apparatus that needs interchangeable rotary scale indicators, this clear dial provides a readable face for measuring angular displacement in physics setups.