Question

If the diameter of a copper wire is doubled its current carrying capacity becomes

Answer 1

Answer:

If the diameter of a copper wire is doubled then its current carrying capacity will become become double.

Explanation:

According to the Ohm's Law

V=IR

Therefore I ∝1/R

That means I will increase if R decreases.

And I know that

R ∝ Ρ*L/A where P = density , l = length and A = Area

Area is inversely proportional to Resistance that means Area decreases if R increases.

Now we know that R is inversely proportional to both Area and Current.

That means Area is directly proportional to Current i.e.

A ∝ I

Hence, if the diameter of a copper wire is doubled then its current carrying capacity becomes double.

Answer 2

Answer:

Explanation:

If the dia metre of the wire is doubled then the resistance of the wire becomes 1/4 times . So the current flow through it easily . Its current carrying capacity will be more.