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.
When the coil is rotated with a constant angular speed `omega`, then the angle `theta` between the magnetic field vector B and the area vector `A` of the coil at any instant `t`, is
Options:
(a) `theta= AB`
(b) `theta= At`
(c) `theta=omegat`
(d) `theta= Bt`