Physics - Electron Beams

Edexcel 360 Science 

P3 Topic 5

CGP Page 74

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1. In an electron Beam, when the heater heats the cathode in order to boil off electrons, what is this process called?

  • Thermionic Emission
  • Thermionic Radiation
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Other questions in this quiz

2. What is the equation used to calculate the Kinetic energy of each electron?

  • Kinetic Energy (J) = Charge of electron (in Coulombs, C) x Accelerating Voltage (in Volts, V)
  • Kinetic Energy (V) = Charge of electron (in Coulombs, C) x Accelerating Voltage (in Joules, J))

3. You can also calculate the size of the current (rate of flow of electrons) produced.

  • Current (l) = Charge (number of electrons, n x the charge of each electron, e) / Time, (t)
  • Kinetic Energy (V) = Charge of electron (in Coulombs, C) x Accelerating Voltage (in Joules, J))
  • Kinetic Energy (J) = Charge of electron (in Coulombs, C) x Accelerating Voltage (in Volts, V)

4. In an x-ray generator the anode is made out of what?

  • Iron
  • Tungsten
  • Steel

5. Every country can afford it's own particle accelerator.

  • False
  • True

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