Motional EMF

  • Thread starter flyingpig
  • Start date
  • #1
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Homework Statement



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The Attempt at a Solution


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[tex]\varepsilon = IR[/tex]

[tex]\varepsilon = -\frac{d \Phi}{dt}[/tex]

[tex]\Phi = BA[/tex]

[tex]-\frac{d \Phi}{dt} = -Bl\frac{dx}{dt} = -Blv[/tex]

So

[tex]\frac{-Blv}{R} = I[/tex]

[tex]\frac{-IR}{Bl} = v[/tex]

Now I plug in and solve, is that right or did I underestimated this question completely?
 
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Answers and Replies

  • #2
2,571
1
Actually I just realize I assumed the current is running counter clockwise..
 
  • #3
2,571
1
Actually never mind, by Lenz' Law the direction is counter clockwise for the current
 
  • #4
2,571
1
Oh wait it says speed, so

[tex]\left | \frac{-lR}{Bl} \right | = |\vec{v}|[/tex]
 
  • #5
2,571
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Please...I need mroe confidence.
 
  • #6
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I'll just trust myself...*crickets*
 
  • #7
SammyS
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Science Advisor
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Looks OK.

Your answer?
 
  • #8
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1
1m/s...
 

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