Q.

Which of the following does not apply to silver

1 The resistance provided is directly proportional to its length.  
2 The resistance provided is inversely proportional to the area of cross section.  
3 Their resistivity is in the range 10-8Ω-m to 10-6Ω-m  
4 The movement of electrons on their outermost orbital is tightly held together.  

Ans.

(4)

For a given continuous piece of uniform wire, the resistance is directly proportional to its length. Thus, silver which is a good conductor of electricity and the resistance in it is directly proportional to its length.