Question

# Two wires each of radius of cross section but of different materials are connected together end to end (in series). If the densities of charge carriers in the two wires are in the ration , the drift velocity of electrons in the two wires will be in the ratio:

A
B
C
D
Easy
Solution
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Correct option is C)

## Let   and be the densities of charge carriers in the two wires,  and be the drift velocities of charge carriers in the two wires, be the area of cross section, is the charge on electron and is the current flowing through both the wires Hence,

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