Daedalon e/m Apparatus

Measure the electron charge-to-mass ratio Use the e/m Apparatus to demonstrate the Lorentz Force Law and measure the charge-to-mass ratio of the electron. Students reproduce J.J. Thomson’s experiment and watch a glowing beam curve in a uniform Helmholtz-coil field. Adjustable accelerating voltage and coil current change beam radius in real time. By measuring orbit size, learners connect electric and magnetic forces to circular motion and calculate e/m quickly. Clear scales, built-in power supply, and safe controls make results fast and repeatable. Why Teachers Love e/m Apparatus Affordable way to teach a core constant: delivers a true e/m measurement lab without the cost or complexity of piecemeal components. Self-contained and easy to run: integrated Helmholtz coils, tube, meters, and matched power supply mean fewer parts to gather and a faster setup. Huge visual payoff: the fluorescent electron beam makes field effects obvious and engaging. Quantitative, not just “wow”: students