Quick Answer: Ampere Law Apparatus is a physics apparatus for demonstrating how electric current in a conductor produces a magnetic field around it, and for exploring Ampère's circuital law and field direction.
Last updated: October 2026
Key Features
Shows that current produces a magnetic field around a conductor
Links enclosed current to the field around a closed path
Supports right-hand-rule field-direction work
Used with a compatible low-voltage supply
About This Product
For steady currents, Ampère's circuital law states that the line integral of the magnetic field around a closed path is proportional to the net current enclosed. With the apparatus on a stable bench, the conductor is connected to a compatible low-voltage supply, the current is set, and the field is observed or measured at the marked positions, keeping the energising time short. Changing the current or position lets students compare results.
Frequently Asked Questions
Q1. How is the direction of the magnetic field found? Students apply the right-hand rule to the current-carrying conductor to work out the direction of the magnetic field around it.
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