A 0.18m long metal rod is places on some metal rollers in a megnetic

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Discussion Overview

The discussion revolves around calculating the voltage induced in a metal rod moving through a magnetic field, specifically when the magnetic field strength is not provided. The context appears to be homework-related, focusing on the application of electromagnetic principles.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant presents a scenario involving a 0.18m long metal rod moving at 1.6 m/s in a magnetic field, seeking to calculate the voltage without knowing the magnetic field strength.
  • Another participant suggests using the formula F = BIL to find the magnetic field strength, proposing to use the weight force (9.8 N) as the force in the equation.
  • A third participant expresses a need for help, indicating uncertainty about the problem.
  • A later reply notes that the question should be posted in a specific subforum for homework to receive appropriate assistance.

Areas of Agreement / Disagreement

Participants do not reach a consensus on how to proceed with the calculations, and multiple approaches are suggested without agreement on the best method.

Contextual Notes

There are limitations regarding the assumptions made about the magnetic field strength and the application of the formulas presented. The discussion does not resolve these uncertainties.

mnishi96
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A 0.18m long metal rod is places on some metal rollers in a megnetic field directed into the page. When the rod is moved left with a speed of 1.6ms-1, a current of 0.034 A is measured through the 25Ω resistor.
How would I calculate the voltage when I'm not given the magnetic field strength? V=BvL
 
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help please!
 
To find B can I use F=BIL?? and for force I use 9.8(weight force)
 
Welcome to PF!

This appears to be a homework or homework-type question and should be posted in the homework subforum. Doing so will ensure you get the appropriate help from our outstanding staff of homework helpers. (instead of wikipedia surfing armchair scientists like myself)

Thanks!
 
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