Current Electricity and Electrical InstrumentMedium
Question
A correct I flows through a uniform wire of diameter d when the mean electron drift velocity is v. The same current will flow through a wire of diameter d/2 made of the made of the same material if the mean drift velocity of the electron is
Options
A.v/4
B.v/2
C.2v
D.4v
Solution
j = = newd
= new .....(i) 
= nev′ .......(ii)
From equation (i) & (ii)
⇒ v′ = 4v
= new .....(i) = nev′ .......(ii)From equation (i) & (ii)
⇒ v′ = 4vCreate a free account to view solution
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