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Right-hand spiral rule

Ampere's rule, also known as the right-hand screw rule, can be used to determine the relationship between the…

Right-hand spiral rule — Basic Science exhibit for science museums
Reference image
CategoryBasic Science
Standard sizeCustom size
SupplySingle unit or batch · OEM to your drawing
Lead timeStandard 4–8 weeks after deposit (confirmed per contract)
Warranty1 year, structure and control
DocumentsSpecification sheet · control diagram · spare-part list

A standard catalogue model: the dimensions, control package and finish are fixed, which is what keeps the price and the lead time predictable. Size, colour and interface language can be adapted without a new design cycle.

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Standard models from this range are also listed in our online store, priced in USD — see the price yourself ↗

01 / Overview

Ampere's rule, also known as the right-hand screw rule, can be used to determine the relationship between the magnetic field of an energized solenoid and the direction of the current. Hold the solenoid with your right hand and point your four fingers in the direction of the current in the solenoid. At this point, the end pointed by your thumb is the N pole of the solenoid. Operating instructions: Press the button to energize the coil and observe the direction indicated by the small magnetic needle; Change the direction of the current and observe the direction indicated by the small magnetic needle.

02 / How visitors use it

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

03 / Built for a public floor

Every unit leaves the factory after a running test: mechanisms cycled, electronics burned in, edges dressed, fixings torqued and marked. Wear parts — bearings, sliders, lamps, belts, touch panels — are modular and listed on the spare-part sheet, so a venue technician can replace them without returning the exhibit. Crating is plywood with foam blocking; the loading plan and packing list travel with the shipment.

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