What are high tension wires? Give two characteristics of these wires.
Wires transmitting electricity at high voltage or potential are called high tension wires. Two characteristics of these wires are :
(i) They possess low resistances (large surface area).
(ii) They are non-corrosive.
It is made by twisting together a number of thin wires insulated from each other so as to provide a large surface area to radiate the heat produced more readily as compared to single thick wire.