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NEET2002PhysicsDual Nature of MatterActual

The speed of an electron having a wavelength of 10⁻¹⁰ ~m is

Options

  1. A7.25 10^6 ~m / s
  2. B5.25 10^6 ~m / s
  3. C6.26 10^6 ~m / s
  4. D4.24 10^6 ~m / s .

Correct answer

A. 7.25 10^6 ~m / s

Step-by-step solution

Wavelength ( )=10⁻¹⁰ ~m . Velocity of the electron, v=h / m = 6.6 10⁻³⁴ (9.1 10⁻³¹ ) (10⁻¹⁰ ) =7.25 10^6 ~m / s . where m= mass of electron equal to 9.1 10⁻³¹ ~kg and h is Planck constant equal to 6.6 10⁻³⁴ ~J - s .

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