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KCET2013PhysicsDual Nature of Matter

Maximum velocity of the photoelectron emitted by a metal is 1.8 10⁶ ~ms ⁻¹ . Take the value of specific charge of the electron is 1.8 10¹¹ C kg ⁻¹ . Then the stopping potential in volt is

Options

  1. A1
  2. B3
  3. C9
  4. D6

Correct answer

C. 9

Step-by-step solution

Given, v=1.8 10⁶ ~m / s ; e m =1.8 10¹¹ C / kg We have, e V₀= 1 2 m v² array ll & V₀ e m = v² 2 & V₀ 1.8 10¹¹= 1.8 1.8 (10⁶ )² 2 & V₀=9 ~V array

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