In an a.c. generator driving a resistive load a coil is rotated slowly between the poles of a
magnet. Which of the following will increase if the coil is rotated more quickly?

1 the frequency of the a.c.
2 the amplitude of the a.c.
3 the output e.m.f. of the generator

Answer:

22) E

If the coil is rotated more quickly, frequency and amplitude will increase. Together with this, the total output e.m.f. will also increase.