1) general writing answer describing things
2) Finding magnetic field (B) and flux in the core with 2 winding no
gap, using graph
3) Long shunt generator: finding back emf (Ea) and efficiency
4) Shunt dc motor: no load speed with non zero armature current
5) Shunt dc motor: 2 step starting circuit finding resistance. Ea and speed
6) Shunt dc motor: speed control with (1) adding armature resistance (2)
adding field resistance