An electric generator contains a coil of 120 turns of wire formed into a rectangular loop 40.0 cm by 20.0 cm, placed entirely in a uniform magnetic field with magnitude B = 3.50 T and with B initially perpendicular to the coil's plane. What is the maximum value of the emf produced when the coil is spun at 1250 rev/min about an axis perpendicular to B?

? V

I tried the following:

Area = (40)(20) = .08m^2;

B = 3.50T <-- magnetic field

Intially

B Flux = BA = (3.50)(.08) = .28 Tm^2;

spun = 1250 rev/min = 20.83 rev/sec;

Emf = N* (change in B flux) / (change in time);

N is the number of turns;

So i tried: Emf = (120)*.28*20.83 = 699.888 which was wrong, any ideas? Thanks.