Current Electricity 1 Question 5
5. In a conductor, if the number of conduction electrons per unit volume is and mean free time is (femto second), it’s approximate resistivity is (Take, )
(a)
(b)
(c)
(d)
(2019 Main, 9 April II)
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Solution:
- Resistivity of a conductor is
where,
and
Substituting values in Eq. (i), we get