Velocity of Electron through potential difference

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SUMMARY

The discussion focuses on calculating the velocity of an electron accelerated through a potential difference of 100,000 volts. The key relationship established is that the energy supplied by the potential difference (VQ) equals the kinetic energy of the electron. The relevant equations include the kinetic energy formula (KE = 0.5 * m * v^2) and the energy equation (E = V * e), where 'e' is the charge of the electron. This establishes a direct method for determining the electron's velocity based on its energy transformation.

PREREQUISITES
  • Understanding of basic physics concepts, specifically kinetic energy.
  • Familiarity with the charge of an electron (approximately 1.6 x 10^-19 coulombs).
  • Knowledge of the mass of an electron (approximately 9.11 x 10^-31 kilograms).
  • Basic understanding of potential difference and its role in energy transfer.
NEXT STEPS
  • Study the relationship between electric potential and kinetic energy in charged particles.
  • Learn how to apply the kinetic energy formula (KE = 0.5 * m * v^2) in practical scenarios.
  • Explore the concept of potential difference and its effects on particle acceleration.
  • Investigate the principles of electron dynamics in electric fields.
USEFUL FOR

Students in physics, educators teaching electromagnetism, and anyone interested in the behavior of charged particles in electric fields.

jono_69a
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Using your actual knowledge of the actual charge of an electron and the mass of an electron, determine he velocity of an electron that has been accelerated across a potential difference of 100000 volts.

Please show me how to do this question. Thanks
 
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Hint: when the electron in accelerated over the potential difference, its kinetic energy increases. Is there an equation that relates the electron's energy to voltage?
 
are you able to give me a little bit more infomation about how you find it. I don't really get this topic that well. Thanks
 
jono_69a said:
are you able to give me a little bit more infomation about how you find it. I don't really get this topic that well. Thanks

Energy supplied by the pd is VQ=Ve (e is charge on the electron) and all that energy goes into increasing the kinetic energy of the electron (what's the formula for kinetic energy?)
 

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