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3.13 The number density of free electrons in a copper conductor estimated in Example 3.1 is . How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is
and it is carrying a current of 3.0 A.
Answers (1)
We know,
:Drift Velocity = Length of wire(l) / time taken to cover
by substituting the given values
t = 2.7 x
s
Therefore, the time required by an electron to drift from one end of a wire to its other end is s.
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