1. The problem statement, all variables and given/known data As shown above 2. Relevant equations *Not too sure if they are relevant. Pretty sure there's more. We have textbooks from the library as references but we still can't quite figure it out :/ Φ = BcAc = BgAg B = Φ/Ac = (Ni/R)/Ac R = lc/(Ac.μ) 3. The attempt at a solution Attempt has been very little. Me and my classmates aren't a smart bunch. So we haven't gotten really far. There were several arguments on how we should handle the flux directions as well. Our attempt: To find Φ (which is flux in core first), Hence using Φ = BA, we find A first in the question Where A = 40cm2 = 0.004m2 To find B, we used: B = Φ/Ac = (Ni/R)/Ac So to find R, we used: R = lc/(Ac.μ) where we used μr=2500 and μ0 to get μ for the R equation. So we used lc which is 1.2m (use the entire core length right ?). We arrived at R= 95480.6 At/Wb To get B we need Ni which is the At, but we don't know how to deal with the two coils and the flux. We've resorted to look for answers online and we hope someone could help us with this. At this point we don't even know if our attempts are appropriate. We appreciate any help given. Thank you.