Question

Rank in order, from largest to smallest, the resistivities ρ1 to ρ5 of these wires. Rank from largest to smallest. To rank items as equivalent, overlap them.

Review l Constants l Periodic Table The wires in (Figure 1) all have the same resistance; the length and radius of each wire are noted. Figure 〈 1of1 〉 2L 2L 4L 4

Answer 1

The resistance of a wire is given as, Here. ρ is the resistivity of the wire. L is the length of the wire, and A is the area of the wire Rearrange the equation R in terms of ρ Let R be the resistance of each wire. The resistivity of the wire 1 is, The resistivity of the wire 2 is, r(2r)R 4