The coil of an ac generator rotates at a frequency of `60 Hz` and develops an induced emf of `120 V (rms)`. The coil has an area of `3.0 xx 10^(-3) m^(2)` and consists of `500` turns. The magnitude of the magnetic field in which the coil rotates is
A. `0.30 T`
B. `3.00 T`
C. `0.03 T`
D. `30 T`