Question

Two wires, one of copper and other of manganin, have equal length and equal resistance. Which wire in thicker? Given that resistivity of copper in less than that of manganin. I NEED A LONG ANSWER

Answer 1

Copper is thicker than manganin.
Because, copper is less resistivity than manganin. Copper resist electricity less than manganin. So, copper is thicker.

Answer 2

Hi..


We know that R =ρ (L / A)

Where,

R= resistance
ρ = resistivity
L = length of the wire
A = area

By the relation given above
Manganin is an alloy of Cu with manganese and nickel. Since the latter two metals have resistivity greater than copper, the pure copper has lower resistivity and the manganin thus has to be thicker to have the same resistance.



Hope this helps u!