E/M set "Deflection of Electrons by a Magnetic or Electric Field
Product Code : SCL-PL-12309
E/M set "Deflection of Electrons by a Magnetic or Electric Field (SKU SCL-PL-12309) is a compact device for studying the principle of the cathode ray tube: it shows electrons being deflected in homogeneous magnetic or electric fields and lets students determine the specific charge e/m in a Thomson-type experiment. It is intended for senior-secondary and undergraduate modern-physics labs. Science Lab Supplies sources and supplies the set from Ambala, India, for schools, colleges, training institutes, tender contractors and distributors.
Specifications
The device combines a tube with a heated tungsten wire, a plate capacitor for the electric field and coils for the magnetic field, with potentiometers for setting test parameters and a built-in 64 x 47 mm colour touch screen. It runs from the 12 V power supply supplied with it.
| Parameter | Value |
|---|---|
| SKU | SCL-PL-12309 |
| Electron source | Tube with heated tungsten wire |
| Deflecting fields | Plate capacitor (electric), coils (magnetic) |
| Controls | Potentiometers for test parameters |
| Display | Integrated colour touch screen, 64 x 47 mm |
| Power | 12 V power supply, included |
| Storage | Case with captive lid, hinged handle, bayonet stacking lock, foam insert with pre-formed cavities |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the E/M Set
The set brings the classic Thomson experiment to a teaching bench: students watch the beam bend in an electric or magnetic field, balance the two fields, and use the settings to calculate e/m. It is a useful addition to a physics lab equipment list class 11 and 12 and to college modern-physics practicals.
- Class 12 physics (moving charges and magnetism; dual nature of matter): force on moving charges and Thomson's e/m experiment.
- B.Sc. physics practical: determining the specific charge of the electron.
- Diploma and engineering physics: the working principle of the cathode ray tube.
Standard Scope of Supply
The set is supplied as one device containing the heated-wire tube, plate capacitor, coils, potentiometers and touch screen, complete with its 12 V power supply, in a stackable storage case with foam insert. Any optional items are listed on the quotation.
Packing, MOQ and Lead Time
Quotations can be prepared for one E/M set for a demonstration bench or several for student groups, each stating packing, delivery time and price for that number. Related electricity sets can be listed on the same quote.
Science Lab Supplies is a registered exporter with an Importer-Exporter Code and can ship to buyers in Bangladesh, Zambia, Rwanda, South Africa, Qatar and Sri Lanka. Questions can go through the contact page; longer lists are easier to send from the enquiry cart; tender buyers should see the lab tender page.
Frequently Asked Questions
What can students measure with this set?
They can observe electron deflection in homogeneous magnetic or electric fields and determine the e/m ratio of the electron, following the Thomson experiment.
Is a power supply needed?
No separate supply is needed; the set is supplied complete with its 12 V power supply.
How should the device be handled?
The tube uses a heated tungsten wire, so allow it to cool before packing it away and follow the instructions supplied with the set. Student use should be supervised by a teacher.
Who supplies the E/M set?
Science Lab Supplies supplies it from Ambala, India, and quotes schools, colleges and tender contractors directly.
Related Electricity and Magnetism Apparatus
These Physics Lab items cover the forces on currents and charges that lead up to the e/m experiment, or add an instrument for viewing signals, so they fit the same teaching sequence and quotation.
- EL4 Lorentz Force Electricity Set — Lorentz force on a current-carrying conductor.
- Electricity EL2+ Set — magnetism, electrostatics and induction.
- Electromagnet Set — for electromagnet demonstrations.
- Oscilloscope — for signal and waveform work.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
