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Q.
A charge is moving across a junction, then
Current Electricity
Solution:
When motion of charge is taking place across a junction, then momentum of charge is not conserved. Because when a charge (i.e., electron) approaches a junction, in addition to a uniform electric field
E
that it normally faces (which keeps the drift velocity v
d
(fixed). there are accumulation of charges on the surface of wires at the junction which also produces electric field, resulting the variation in the direction of momentum of charge.