Given reason for the following
$(i)$ Tungsten used almost exclusively for filament of electric lamp.
$(ii)$ Why do we use copper and aluminium wires for transmission of electric current ?
Given reason for the following
$(i)$ Tungsten used almost exclusively for filament of electric lamp.
$(ii)$ Why do we use copper and aluminium wires for transmission of electric current ?
$(i)$ Tungsten is used in making the filament of an electric bulb because
$(a)$ Tungsten has high melting point.
$(b)$ Tungsten has high resistivity to retain much heat.
$(ii)$ Copper and aluminium have low resistivity and they are good conductors of electricity. So, they are used for transmission of electric current.
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