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Current Electricity question

2019 · 9 Apr · Shift 2 · Q45
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Current Electricity question

2019 · 9 Apr · Shift 2 · Q45

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
In a conductor, if the number of conduction electrons per unit volume is 8.5 × 1028 m–3 and mean free time is 25ƒs (femto second), it's approximate resistivity is :- (me = 9.1 × 10–31 kg)
  1. A
    10–8 Ω\OmegaΩ m
  2. B
    10–7 Ω\OmegaΩ m
  3. C
    10–5 Ω\OmegaΩ m
  4. D
    10–6 Ω\OmegaΩ m
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