Question

which material is used as insulator for slots of armature​

Answer 1

Slot insulation is the common name for shielding material used for the rotor inside a power generator. The slot insulation process for electric motors provides a barrier between the copper wirings and the steel lamination for all stator, armature and rotor products.

Answer 2

Copper and Aluminium are  used as insulator for slots of armature​.

Explanation:

• Rotating field is comparatively light and can run with high speed.
• High voltage can be generate due to high speed and there is very little difficulty in providing high voltage on a stationary part than a moving part.
• The armature current is the current flowing through the windings of the moving, or rotating, part of the motor (called the rotor, or the armature).  
• But if the stator and rotor windings are connected in series. then the machine is called a series-wound motor.
• The field current and the armature current are identical.

Learn more about armature

Function of soft iron armature coil in electric bell

https://brainly.in/question/7027863

Use of ARMATURE,SPLIT RINGS,BRUSHES and STRONG FIELD MAGNETS in an electric motor

https://brainly.in/question/5521109