1. The problem statement, all variables and given/known data A flat coil of wire has an area of 0.010 m2and contains 100 turns. Initially the coil is oriented so that the normal to its surface is parallel to a downward constant magnetic field of 0.2 T. The coil is then rotated clockwise through an angle of 30oin a time of 0.10 s. What is the average induced emf? (Note: the initial emf is zero) a. 0.50 V b. 0.45 V *c. 0.18 V d. 0.25 V 2. Relevant equations emf=-Δ[itex]\Phi[/itex]B/Δt [itex]\Phi[/itex]B=N*ABcos(θ) 3. The attempt at a solution emf=-Δ[itex]\Phi[/itex]B/Δt emf=-N*AB(cos(θ1)-cos(θ2))/Δt emf=-100*0.01m2*.2T(cos(0)-cos(30))/.1s emf=2.7x10-2V the answer appears to be .18V...can someone tell me why is this? thanks!