Varying the number of turns in coil

Making series connection of coils

Making parallel connection of coils

Making current flow in different direction

Empire cloth

Triplex paper

Millinex paper

Leatheroid paper

4

6

8

14

Drive out the moisture from it

Help for quick drying of varnish

Make easy to penetrate varnish inside

Maintain uniform spreading of varnishing

By changing the direction of armature current

By interchanging the supply terminals

By changing the direction of both field and armature current

By changing the direction of series field current