Kirchoff's junction rule is a reflection of

Options

A. conservation of current densit vector
B. conservation of charge
C. the fact that the momentum with which a charged particle approaches a junction is unchanged (as a vector) as the charged particle leaves the junction
D. the fact that there is no accumulation of charged at a junction

Explanation

The resistivety of a metallic conductor is given by, `e=(m)/(n e^(2)t)`
Where `n` is number of charge carriers per unit volume which can change with temperature T an `tau` is time interval between two successive collisions which decreases with the increases of temperature