Current Electricity and Electrical InstrumentEasy
Question
The drift velocity of the free electrons in a conducting wire carrying a current ′i′ is v. If in a wire of the same metal, but of double the radius, the current be 2i then the drift velocity of the electrons will be :-
Options
A.v/4
B.v/2
C.v
D.4V
Solution
I = ne AV.................(1)
and 2I = ne(4A) V′ .......(2)
from (1) and (2) V′ = V/2
and 2I = ne(4A) V′ .......(2)
from (1) and (2) V′ = V/2
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