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NEET2009PhysicsCurrent ElectricityActual

The mean free path of electrons in a metal is 4 10⁻⁸ ~m . The electric field which can give on an average 2 eV energy to an electron in the metal will be in unit of Vm ⁻¹

Options

  1. A8 10^7
  2. B5 10⁻¹¹
  3. C8 10⁻¹¹
  4. D5 10^7

Correct answer

D. 5 10^7

Step-by-step solution

aligned Energy & =2 eV eV ₀ & =2 eV V ₀ & =2 aligned Now, electric field aligned E & = 2 4 10⁻⁸ & =0.5 10^8 & =5 10^7 Vm ⁻¹ aligned

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