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A-level Physics (Advancing Physics)/Electron Behaviour as a Quantum Phenomenon/Worked Solutions

< A-level Physics (Advancing Physics)‎ | Electron Behaviour as a Quantum Phenomenon

1. An electron moves at 30,000 ms-1. What is its de Broglie wavelength?

2. What is its frequency?

3. What is its kinetic energy, in eV?

From the top half of the fraction in the previous question:

4. Given that it is travelling out of an electron gun, what was the potential difference between the anode and the cathode?

2.56 mV – that's why we use eV!

5. An electron is accelerated by a potential difference of 150 V. What is its frequency?