1. The problem statement, all variables and given/known data A flat coil of wire consisting of 20 turns, each with an area of 50 cm^2 is positioned so that the normal to its plane is at the angle of 30 degrees to a uniform magnetic field that increases its magnitude at a constant rate from 2.0T to 8.0T in 2.0 s. 2. Relevant equations Induced EMF(E)= -rate of change of magnetic flux/ change of time 3. The attempt at a solution Induced EMF(E)= rate of change of magnetic flux/ change of time or = (N)(Change of B)(A)(COS Theta)/ Change of Time N=20 A= 50 cm^2 Change of Time= 2.0 S COS 30 degrees= .87 Change of B= 8.0T-2.0T=6.0T The solution as posted by the teacher was, Induced EMF(E)= (20)(6.0T)(.005M^2)(.87)/ 2 s = .260 V I do not understand how 50 cm^2 becomes .005M^2 also what happened to the negative sign? Thank you!