1) Describe how transformers are categorized according to their construction?
2) prepare down the emf equation for d.c. generator.
3) Describe why armature core in d.c machines is constructed with laminated steel sheets instead of solid steel sheets?
4) Describe why commutator is used in d.c.machines?
5) prepare down the difference between shunt and series field coil construction.
6) Describe how does d.c. motor differ from d.c. generator in construction?
7) Describe how will you change direction of rotation of d.c.motor?
8) What do you mean by back emf in d.c. motor?
9) Why starter is essential for the dc motor?
10) prepare down the applications of step-up and step-down transformer?