- #1
Minescrushessouls
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Homework Statement
Two concentric circular coils of wire lie in a plane. The larger coil has 61 turns and a radius of a = 7.40 cm. The smaller coil has 58 turns and a radius of b = 0.95 cm. The current in the larger coil has a time dependence as shown in the figure.
Picture and graph:
http://imgur.com/fHB07bx
Approximately what is the magnitude of the EMF induced in the small coil at t = 8 s?
Homework Equations
ξ=(d/dt)∫B⋅dA
∫B⋅dl=μ*I
The Attempt at a Solution
I tried taking the derivative of the slope given with respect to time
So -15*e^(-3t)
And multiplying that by the area of the small coil and the number of turns in the small coil.
I don't really know where to go from there. [/B]
I got 3.78E-12 V and that's not right