If the image is hard to see, just zoom in on your screen. Been having trouble with this question and tried so many times. I am not sure if I am just inputting my values incorrectly or what, but please explain in full detail on your work.
Inductance of toroidal solenoid is given by
L = u*N^2*A/(2*pi*r)
E = 0.5*L*i^2
E = u*N^2*A*i^2/(4*pi*r)
N = sqrt [4*pi*r*E/(u*A*i^2)]
N = sqrt [4*pi*0.152*0.387/(4*pi*10^-7*4.98*10^-4*11.8^2)]
N = 2912.59 turns
If the image is hard to see, just zoom in on your screen. Been having trouble...
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