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BITSAT Chemistry Structure of Atom 2024 BITSAT 2024 (Memory Based Paper 1)

BITSAT Chemistry Question (2024) — Solution

Question

A stream of electrons from a heated filament was passed between two charged plates kept at a potential difference V volt. If 'e' and m are charge and mass of an electron, respectively, then the value of h / (where is wavelength associated with electron wave) is given by:

Options

  1. A. m e V
  2. B. 2 m e V
  3. C. m eV
  4. D. 2 m e V

Answer

B. 2 m e V

Step-by-step solution

As electron of charge ' e ' is passed through ' V ' volt, kinetic energy of electron will be eV . Wavelength of electron wave ( )= h 2 m KE =- h 2 m eV h = 2 m eV

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