AC Generator
An AC generator produces electrical energy from mechanical work, just the opposite of what a motor does. In it, a shaft is rotated by some mechanical means, such as an engine or a turbine starts working and an emf is induced in the coil.
It is based on the phenomenon of electromagnetic induction which states that whenever magnetic flux linked with a conductor (or coil) changes, an emf is induced in the coil.
The graph below shows the voltage output plotted against time. Which point on the graph shows that the coil is in a vertical position?
Options:
(a) P
(b) Q
(c) R
(d) S