In a conductor , if the number of conduction electron per unit volume is and mean free time is ( femto second ) , it's approximate resistivity is :
Resistivity -
- wherein
It is independent of shape and size of the body i.e. and
we know that ,
Option 1)
Option 2)
Option 3)
Option 4)
Study 40% syllabus and score up to 100% marks in JEE