is the motion of a charge across junction momentum conserving? why or why not?

25-Aug-2017 11:43 AM

Answers (1)


No, the momentum isn't at all conserved at the junction, see, momentum is a vector quantity i.e., changes when it's direction changes(i.e., when the direction of velocity changes), the electrons drift in a condutor under the action of electric field, they are drifting in a CONSTANT DIRECTION with a CONSTANT velocity (drift velocity), but at the junction(where three or more wires interact), there direction of velocity changes(i.e., they gets scattered across various directions), hence directions of momentum vector changes, so yes!, it changes at the junction.

08-09-2017 22:55

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