The thickness of the layer of insulation on the conductor, in cables, depends upon

Which of the following insulation is used in cables?

Which of the following protects a cable against mechanical injury?

The material for armouring on cable is usually

Cables, generally used beyond 66 kV are

A certain cable has an insulation of relative permittivity 4. If the insulation is replaced by one of relative permittivity 2, the capacitance of the cable will become

In the cables, sheaths are used to

In a cable the voltage stress is maximum at

The thickness of metallic shielding on cables is usually

Underground cables are laid at sufficient depth