Why the voltage is stepped up before transmitting electricity over long distance?

Stepping up the voltage can reduces the current in the cable. This reduces the power loss in the cable during transmission.

[This image is shared by its author Aatu Liimatta in Wikipedia Image. This file is licensed under the Creative Commons Attribution ShareAlike 2.5 License.]

Problems Involving Electricity Transmission.

1. Power Loss During Transmission.
2. The high voltage transmission cable is very dangerous.
3. The cost of the cables are high.
4. Charge leakage may happen between cables and earth.
5. Pylons may be struck by lightning.
6. Pylons and cables may be struck by light aircraft.

Which of the following is not a ferromagnetic material?

A. Cobalt
B. steel
C. Aluminum
D. Nickel