Which of the following is drawback of VIR?

Varnished cambric is

What are the major drawback of pure rubber?

If the insulating material is hygroscopic, it must be

VIR is prepared by mixing pure rubber with

Which of the following properties should have the insulating materials used in cables?

The resistivity of rubber insulation is about

Dielectric strength of rubber is about

Why dielectric strength of insulating materials should be high?

Armouring is/are