Enlist the energy changes taking place in a hydroelectric power station.

(N/A) $(i)$ $PE$ of water stored in the reservoir changes into $KE$ as it flows through the tunnel.
$(ii)$ $KE$ of the flowing water is converted into rotational $KE$ of the turbine.
$(iii)$ Rotational $KE$ of the turbine is transferred to the armature of the generator.
$(iv)$ Rotational $KE$ of the armature is converted into electrical energy due to electromagnetic induction as the coils rotate within a magnetic field.