Question

Explain the following:
1)Copper and Aluminum wires are employed for electicity transmission.
2)Heating devices are made of an alloy rather than a pure metal.
3)Tungsten is used for filament of electric lamp
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Answer 1

I can explain first one

HERE

Copper and aluminium wires are generally used for electricity transmission as they have low resistivity. Low resistivity decreases the resistance and hence increases the amount of current in the circuit. Therefore, they are good conductors of electricity.