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Magnetism Question

  • Thread starter tayi
  • Start date
  • #1
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0

Homework Statement




Given: A tightly wound circular coil has
81.9 turns , each of radius 0.1 m. The uniform
magnetic field is in a direction perpendicular
to the plane of the coil. The field increases
linearly from 0 T to 0.851 T in a time of
0.364 s .
What E is induced in the windings of the
coil?
Answer in units of V.

Homework Equations



emf=Blv
emf(average)=magnetic flux/time


The Attempt at a Solution


I think this can be solved using magnetic flux, but i dont reallly know how to go about doing it
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31

Homework Equations



emf=Blv
emf(average)=magnetic flux/time


The Attempt at a Solution


I think this can be solved using magnetic flux, but i dont reallly know how to go about doing it
Start with your equation

emf = -dΦ/dt where Φ=NBA, thus your equation becomes

emf = -d/dt(NBA)

N and A are constant so emf=-NA dB/dt. So how you would get dB/dt which is the rate of change of the magnetic field per unit time.
 

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