Question

Two metallic wires of the same material and same length but different crosssectional areas are joined together (i) in series (ii) in parallel, to source of emf. in which of the two wires will the drift velocity of electron be more in each of the two cases and why

Answer 1

(i) Same current is flown in series connection...we all know that!

Now we know I = neAVd.

Here except A and Vd, all other parameters are constant. So if A increases, Vd decreases and vice-versa.

(ii) Now I = neAVd = V/R = V/pl/A

So, Vd = V/nepl.

So it is cclear that in parallel connection i.e, in this case, Vd is throughout constant.

Cheers Beautiful!!

Answer 2

hope this is helpful