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MHT CET2018PhysicsDual Nature of Matter

If an electron and a proton have the same de-Broglie wavelength, then the kinetic energy of the electron is

Options

  1. AZero
  2. BLess than that of a proton
  3. CMore than that of a proton
  4. DEqual to that of a proton

Correct answer

C. More than that of a proton

Step-by-step solution

Given, λ = h m v = h 2 m K E ⇒ K E = 1 2 m λ 2 As λ is same for both electron and photon So, K E ∝ 1 m Hence, kinetic energy will be maximum for particle with lesser mass, i e , electron.

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