Two wires of equal length, one made of aluminium and other of copper, have same
resistance. Which will be thicker? Explain.
Answers
Answer:
Two wires have same length and the resistance . as the specific resistance or resistivity of resistance are unequal , the areas are different.
we know formula,
for copper wire,
for aluminum wire,
because
so,
we also know, density = mass/volume
mass = density × volume
mass = density × base area × length
so,
Here it is clear that ,
thus, the aluminum with for the same resistance is very light than copper and that is why aluminum wire are preferred for overhead power cable.
Explanation:
it shows that copper wire is 2.16 times heavier than alluminium wire. since for the same value and the lenght and resistance, aluminium wire has lesser than the copper wire...
therefore aluminium wire is preferred for
overhead power cables...
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