Question

there is a wire of non uniform cross section
what remains constant in it?
a>current b>current density c>E(vector) d>drift velocity e>resistivity......... when both a cell is connected and when not connected

Answer 1

1 is correct

Answer 2

how ? n also it is nAVde not eta

Answer 3

when cell is connected.........
J=n(Vd)e,


e,Vd...are.constant J=n(Vd)e,is.varying
.as n=no of e per vol is variable resng 1

resng 2
which of these is correct?