BRAINCAKEThe Electron Gun
The electron gun is a device used to produce a narrow beam of electrons.
Electron guns are used in electron microscopes, in mass spectrometers to ionise particles and in cathode ray oscilloscopes to produce traces of light on a screen.
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Key terms in this lesson
- energy
- The capacity of a system to do work.
- kinetic energy
- The energy an object possesses due to its motion.
- electric current
- The rate of flow of electric charge.
More in Electricity
- Conductors and Semi-Conductors
- Current and Drift Velocity
- Potential Difference
- Electromotive Force
- Resistance
- Ohm's Law
- Temperature and Resistance
- IV Graphs
All 30 lessons in Electricity · All OCR AS-level Physics topics