Answer
0.11 T
Work Step by Step
Recall that $\epsilon_{0}=NBA(2\pi\nu)$
where $\epsilon_{0}$ is the maximum emf, N is the number of turns, B is the magnetic field, A is the area, and $\nu$ the frequency.
Thus, we find:
$B= \frac{\epsilon_{0}}{NA\times2\pi\nu}=\frac{5500V}{150\times0.85m^{2}\times2\pi \times60 Hz}$
=0.11 T
