Question
Physics Question on Current electricity
A charge is moving across a junction, then
A
momentum will be conserved
B
momentum will not be conserved
C
at some places momentum will be conserved and at some other places momentum will not be conserved
D
none of these
Answer
momentum will not be conserved
Explanation
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.