defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Current, Resistance and Electricity Resistance and Resistivity
If 'τ' is the relaxation time, 'n' is the number of free electrons per unit volume in the conductor ('e' is charge and 'm' is mass of an electron) then, the term "ne2τ/m" is equal to the __________.
1
conductivity
2
resistivity
3
permittivity
4
mobility