Q1.
Where do you find the use of metal wires?
Answer
| Where you see metal wire | Which metal, and why it is used |
|---|---|
| Electrical fittings in the house | Copper or aluminium — good conductors of electricity |
| Ornaments — bangles, necklaces, earrings | Gold, silver — very ductile, so they can be drawn fine and twisted |
| Stringed instruments — veena, sitar, violin, guitar | Steel, brass — a taut metal wire vibrates and gives a clear note |
| A tea strainer, a sieve, wire mesh | Steel wire woven into a net |
| Ropes of suspension bridges and cranes | Steel wire, which can bear very heavy loads |
The property that makes all this possible is ductility — the property of materials by which they can be drawn into wires.
Did you know? Gold is so ductile that one gram of it can be drawn into a 2 kilometre-long wire.