Two solid conductors are made up of same material, have same length and same resistance. One of them has a circular cross section of area A 1 and the other one has a square cross section of area A 2 . The ratio A 1 A 2 is

Step-by-step solution

First, remember the relation between resistance and specific resistivity in terms of length and cross-section area, R = ρ l A , given, the resistance of the conductors is the same, R 1 = R 2 and they are made from the same material, so ρ 1 = ρ 2 ⇒ 1 A 1 = 1 A 2 ⇒ A 1 A 2 = 1 .