The EMX‑01 (Digital) setup is a modern, precise, and easy-to-operate experimental apparatus designed to determine the charge-to-mass ratio (e/m) of an electron using Helmholtz coils and a fine electron beam tube. This digital model includes high-resolution digital meters for voltage and current, significantly improving accuracy and ease of data recording.

The apparatus demonstrates the circular motion of electrons under a magnetic field and allows students to quantitatively evaluate the e/m ratio by measuring the radius of the electron beam path inside a fluorescent display tube. The built-in scale and transparent tube housing allow clear visualization and precise radius measurement.

This system is widely used in undergraduate and postgraduate physics laboratories for foundational experiments in modern physics and electromagnetism.

🔧 Key Features

• Helmholtz Coil Configuration for uniform magnetic field

• Digital Display for acceleration voltage and coil current

• Electron Beam Tube with phosphorescent screen for clear beam visibility

• Transparent Acrylic Housing for safe viewing and measurement

• Built-in Ruler/Grid for radius measurement

• Accurate Determination of e/m ratio using standard formula

• Compact & Rugged Design suitable for lab use

Applications

• Determination of e/m ratio of the electron

• Study of electron motion in magnetic fields

• Electromagnetic theory experiments

• Demonstration of Lorentz force on a charged particle

• Undergraduate physics lab experiments in modern physics