| The conductivity of a conductor increases with increase in temperature, because : |
number density of free current carriers decreases relaxation time increases both 1 and 2 number density of carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density |
| number density of carriers increases, relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density |
| In electrolytic conductors, the ions are charge carriers and with increase in temperature, ionization increases and hence, conductivity increases. |