Activity 3.4 NCERT Class 10 Science, Chapter 3 Metals and Non-metals
Activity 3.4 asks us to list some metals which find its use in the wire.
Aluminium, copper, nickel, chromium, gold, silver.
In normal homes, we use aluminium (white core) or copper wire (Golden colour). Now Aluminium wires are less common as copper wires are a better conductor of electricity.
An electric wire on pole still uses aluminium wire because the copper wire is very costly.
Nickel and chromium have lesser conductivity. They are mixed to form nichrome wire. Some wired electric heater consists of nichrome wire.
Apart from all these metals, precious metals like silver and gold also find use in the electronic industry as wire.
They have very high thermal and electrical conductivity. As a result, we use them as a coating in high-quality switches and plugs.
Some electric circuits also consist of silver or gold wires