Answer / mohamed mustafa

Mechanical strength of CU is more than ALU
cu has more corrosion resistance than alu
resistivity of cu is less than ALu so a good conductor current

Answer / vinod

---> Copper (Cu) was a good CONDUCTOR (good conductivity) than
Aluminium (Al).
---> Al is cheaper than cu
---> Earthing was done because of excess of electrons passes
through the Equipment/Device hence the device was damaged. So
Earthing prevents equipments from (excess of
electronics)damage.

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