Force on electron from current-carrying wire

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SUMMARY

The discussion centers on calculating the force on an electron from a current-carrying wire using the equations F = IL x B and F = QV x B. Participants emphasize the necessity of determining the magnetic field (B) at a specific distance from the wire, which can be achieved using the Biot-Savart law or Ampere's law. The conversation highlights the importance of understanding the magnetic field generated by a straight wire carrying current to solve the problem effectively.

PREREQUISITES
  • Understanding of the Biot-Savart law
  • Familiarity with Ampere's law
  • Knowledge of electromagnetic force equations
  • Basic concepts of magnetic fields around current-carrying wires
NEXT STEPS
  • Study the Biot-Savart law in detail
  • Learn how to apply Ampere's law for calculating magnetic fields
  • Explore the relationship between current, magnetic fields, and force on charged particles
  • Investigate practical applications of electromagnetic force in engineering
USEFUL FOR

Students in physics, educators teaching electromagnetism, and engineers working with electromagnetic systems will benefit from this discussion.

dvdqnoc
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Homework Statement


http://img236.imageshack.us/img236/5369/physxn6.png

Homework Equations


F = IL x B
F = QV x B


The Attempt at a Solution



Since I know I, L, Q, and V, I tried to work those into the two force equations... but I got no where. They don't give me B.
 
Last edited by a moderator:
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dvdqnoc said:
Since I know I, L, Q, and V, I tried to work those into the two force equations... but I got no where. They don't give me B.

Surely you can find B at a given distance from a long wire carrying a known current? Do you remember how the magnetic lines of force are around a straight wire?
 
In getting the force you need to find the B-field first, either by applying the law of Biot-Savart or Ampere's law. Of course you could also have it memorized, but that just takes all the fun out of it.. :)
 

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