Fundamentholfundamenthol
JEE Main2019Physics
Q.

In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028m–3and mean free time is 25 fs (femto second), it’s approximate resistivity is (me = 9.1 × 10–31 kg)

  1. A

    10–5m

  2. B

    10–6m

  3. C

    10–7m

  4. D

    10–8m

Solution

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