Solve the following problems:
Problem I: Calculate the magnitude of the induced emf in a 400-turn coil if the magnetic field inside the coil increases from 0T to 0.0200T (200g) over a time of 0.10 s. Presume the area of the coil is 0.0004 m2.
Problem II: If the induced emf in the first part was negative, what happens to the magnitude and the sign of the induced emf when the girld is reduced form 0.0200T to 0T in 0.10 s?
Please, try to give explanation for above problems. Thanks.