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- PHY102 Physics II © Dr.Cem Özdoğan
- 28-4 Crossed Fields: Discovery of the Electron
- Both a E and a B can produce a force on a charged particle.
- When the two fields are perpendicular to each other, they are said to be crossed fields.
- What happens to charged particles as they move through crossed fields?
- A modern version of apparatus for measuring the ratio of mass to charge for the electron.
- When the two fields in Fig. are adjusted so that the two deflecting forces cancel
- Thus, the crossed fields allow us to measure the speed of the charged particles passing through them.
- Deflection of the particle at the far end of the plates is
B ┴ E