Current Electricity and Electrical InstrumentHard
Question
Two weirs each of radius cross section r but of different materials are connected to gather end to end (in series). If the densities of charge carries in the two wires are in the ratio 1: 4, the drift velocity of electrons in the two wires will in the ratio :
Options
A.1 : 2
B.2 : 1
C.4 : 1
D.1 : 4
Solution
j → Current density n → Current density
j = -nevd vd1 =
vd2 =
⇒ n = 4n1
= 4 : 1
j = -nevd vd1 =
vd2 =
⇒ n = 4n1 = 4 : 1Create a free account to view solution
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