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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 “Rank in order, from largest to smallest, the resistivities ρ1 to ρ5 of these wires.”

A wire’s resistance is measured as

Here, ρ is the resistivity of the wire    

          L is the length of the wire

          And A is the area of the wire

Let R be the resistance of each wire.

The resistivity of the wire 1 is, 

The resistivity of the wire 2 is,

The resistivity of the wire 3 is,

The resistivity of the wire 4 is,

The resistivity of the wire 5 is,

These resistivity values are used to determine the order of resistance of wires from the largest to the smallest.

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