Key benefits Visual, quantitative demonstration of how the direction and magnitude of current affect the magnetic force on a conductor. Shows how current strength, conductor length in the field, and magnetic induction intensity combine to produce a measurable deflection. Simple, direct reading via a dial and pointer for clear comparison and teaching or laboratory measurements. Main functions and features Demonstrates the relationship between ampere force (force on a current-carrying conductor), current magnitude, conductor length in the field, and magnetic induction intensity. Wire frame (conductor) is suspended in a uniform magnetic field; the conductor is deflected by the ampere force while its weight produces a horizontal restoring component. When these forces balance, the wire frame settles at a stable deflection angle. Deflection is amplified and displayed on a dial by the pointer so changes in received ampere force are easy to read. Built-in pointer allows calibration to zero before use. Performance and operation notes The deflection angle is proportional to the net ampere force; larger angles indicate greater force. Before each use, set the pointer to the zero scale to ensure accurate readings. Ensure reliable electrical contact: the three contact points on the wire frame must touch the terminal tongues of the clamp. If contact is poor, lightly polish contact surfaces with fine sandpaper. If the middle contact does not reach a tongue, gently press the tongue down until contact is made. Compatibility and handling Intended for use where a conductor can be placed in a uniform magnetic field and connected to a controlled current source. The instrument requires good mechanical alignment and clean electrical contacts for consistent, repeatable results. Practical applications (use scenarios) Classroom demonstrations: Show students how increasing current or changing conductor length in a magnetic field affects the force and deflection angle. Laboratory experiments: Quantitatively explore the dependence of magnetic force on current magnitude and magnetic induction for introductory physics labs. Instrument calibration/checks: Use as a diagnostic tool to verify expected behavior of current-induced forces in a controlled magnetic field setup. What to check before and during use Calibrate the pointer to the zero scale each time before taking measurements. Confirm all three wire-frame contacts have firm contact with the clamp terminal tongues; repolish contacts with fine sandpaper if necessary. If the central contact is not engaging, press the terminal tongue down gently to achieve proper contact. This instrument provides a clear, hands-on way to observe and measure how current, conductor length, and magnetic field intensity combine to produce the ampere force on a conductor, with a dial readout that simplifies comparison and instruction.