Several wires of varying thickness are all made of the same material and all hav

Question

Several wires of varying thickness are all made of the same material and all have the same length. If the wires are arranged in order of decreasing thickness, what can be said about the ordering of their resistance?

   The ordering of the resistances can not be determined because the length is not given.
   The ordering of the resistances can not be determined because the resistivity is not given.
   The wires will be arranged in order of decreasing resistance.
   The wires will be arranged in order of increasing resistance.

Explanation / Answer

here,

resistance of wire is inversaly proportional to area

when the thickness of the wire is increased ,

their resistance is decreased

therefore,

when wires are arranged in order of decreasing thickness

the wires will be arranged in order of increasing resistance

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