Two copper wires with different diameters are joined end to
end. If a current flows in the wire combination, what happens to
electrons when they move from the larger-diameter wire into the
smaller-diameter wire? Does their drift speed increase, decrease,
or stay the same? If the drift speed changes, what is the force that
causes the change? Explain your reasoning.

Question

Two copper wires with different diameters are joined end to
end. If a current flows in the wire combination, what happens to
electrons when they move from the larger-diameter wire into the
smaller-diameter wire? Does their drift speed increase, decrease,
or stay the same? If the drift speed changes, what is the force that
causes the change? Explain your reasoning.

anonymous · Answer

i think drift velocity remains same if the same material

anonymous · Answer

In series combination I = n.A.e.Vd remains constant.So-- Vd is inversely proportional to diameter square:)