All the peripheral devices connected to a computer require power to work. Which of the following voltages is required for the motherboard to work?

The picture on the monitor of a computer is made up of tiny coloured dots called

Due to skin effect

Skin Effect:
tendency of the current to crowd near the conductor surface.

Skin effect is proportional to frequency, conductor diameter and permiability.
Skin effect increases effective resistance of conductor.
In DC, no skin effect.

Which of the following power distribution system gives better reliabity ?

The bus bar zone faults are generally

If the dielectric strength of the medium between the contacts builds up more rapidly than the restriking voltage the arc will