Answer:
<u>4.19 V</u>
Explanation:
Magnetic field flux and induced emf formula is:

Where
is the max emf (what we want)
N is the number of turns (N = 400)
A is the Area which is (
)
is the angular velocity (
, f is frequency, f = 90)
is the max magnetic field value (given as 59 mT)
Finding A, Area:

In meters squared, it would be:
A = 3.14 * 10^-4 meter squared
Calculating angular velocity:

Now, finding max EMF:

So, the max value emf in the coil is around <u>4.19 V</u>