Question

$1$, $2$, $3$ and $4$ are the four stages of a rotating armature coil placed between the poles of a filed magnet.
(a) In which stage / stages will the emf be maximum?
(b) Represent graphically the relation between induced emf and angle of rotation of the coils in stages $1$, $2$, $3$ and $4$.

Answer 1

(a) $1$ and $3$ as shown in the diagram. In position $1$ and $3$ the rotating armature having maximum and minimum emf respectively.

(b) The graphical representation is shown below: